As the world becomes more aware of the impact of climate change, businesses are starting to shift their focus towards sustainable practices. One such company is Green Mountain Ener...Use this handy dandy dealer locator to find an Authorized Green Mountain Grills dealer …Feb 29, 2024 · 5/5 - (85 vote) Green Mountain Barrel Blanks Review: Unleashing Unparalleled Accuracy Description Button-rifled, 4140 chrome moly or stainless steel barrel blanks are stress-relieved and air gauged to +/- .0002″ for superb accuracy and performance from your custom rimfire rifle. A Green Mountain Barrel would be a great upgrade for your favorite target, competition, or small varmint hunting rimfire rifle. Like all Green Mountain barrels these are proudly made in the USA. Specs: Length: 24". Profile: .920" Bull. Rifling: Button. Twist Rate: 1:16. Material: 416 Stainless. Weight: 4.1 pounds.Ive seen how Green Mountain barrels shoot first hand recently and they are probably the best bang for your buck button barrel on the market. They shoot as good as a Criterion, Shilen, etc. Are they a Kreiger, Bartlein, Rock cut rifled barrel, no. They shoot lights out and are inexpensive. Have one spun up for your Stag 223.Green Mountain Barrel. by JD, from MS, United States Written on July 27, 2023. After installing the barrel on my 10/22 , i sighted in at 25 yards, once that was accomplished I moved back to 50 yards for groups. The first group was 1/2” , the second group was just under 1/2”. That’s with CCI standard velocity 40 grain. We would like to show you a description here but the site won’t allow us. Cracker Barrel is a beloved American restaurant chain known for its delicious comfort food and charming country store. While many people are familiar with the delightful experience...Check out the GREEN MOUNTAIN available Online at Brownells Today and many more …2,943. Feb 18, 2018. #7. I converted a 50cal TC to 54 with a Green Mountain drop in barrel a long time ago. I shoot .535 balls and some pretty thick patches. I suspect you won't be needing them .530 round balls much longer.Product Overview. These barrels are made from premium quality 4140 Chrome Moly Steel then precision-reamed, button rifled, short chambered, stress relieved and air gauged to + or - .0002". The chambers are cut a nominal .050" short to allow for establishing correct headspace to a given receiver. The proper break-in procedure requires cleaning ...BP0222 Green Mountain Rifle Barrel - 1" X .58 Caliber X 36" Length. Machined from finest quality American round bar stock, pre-straightened before drilling to assure minimum run out. After drilling, all barrels are reamed three times then burnished for highest quality bore finish. Rifled with 8 lands and 8 grooves with a nominal groove depth of ...If you’re in the mood for some hearty, home-style cooking, look no further than Cracker Barrel. Known for its Southern charm and comforting dishes, Cracker Barrel offers a full men...Muzzle loading rifle barrels, IBS by Green Mountain for T/C Hawken Green Mountain Interchangeable Rifle Barrels: Order a target ready round ball barrel for your Thompson Center Hawken Rifle. These rifle barrels are completely assembled, with the breech plug, lug, rib, pipes and adjustable sights installed. All barrels are blued, and include a new …Green Mountain Rifle Barrel Co. P.O. Box 2670, 153 West Main St. Conway, NH 03818 P: (603)447-1095 F: (603)447-1099 So if you don’t buy it directly from G.M. You are pretty much on your own. I purchased this from Cabela’s and no longer have the receipt plus I’m sure cabela’s would only allow an exchange at best.green mountain rifle barrel. Save this search. Shipping to: 23917. Shop on eBay. Brand New. $20.00. or Best Offer. Sponsored. Green Mountain Ruger 10/22 20" Stainless Tapered Barrel 22LR 1022 Kidd 901914.Green Mountain 10/22 Replacement Barrels 20" Product #: GQ901521 UPC: GQ901521 Mfg Part #: 901521. Finish. Finish. $147.49. or 4 interest-free payments of 36.87 with ⓘ-+ ADD TO CART ... Barrel Twist Rate. 1:16. CA Prop 65. 1. Color. Silver. Finish. Stainless Steel. SHOW MORE. Sign up for exclusive offers.Based on the success of padom and others with straight taper green mountain barrels spun up by manzella using the eachus chamber on rim-x builds, I'm wondering if anyone has tried this combination with a 457. Seems like they hammer and could provide a good "budget" option. I did some searching and couldn't come up with much.Feb 29, 2024 · 5/5 - (85 vote) Green Mountain Barrel Blanks Review: Unleashing Unparalleled Accuracy Description Button-rifled, 4140 chrome moly or stainless steel barrel blanks are stress-relieved and air gauged to +/- .0002″ for superb accuracy and performance from your custom rimfire rifle. Green Mountain Muzzle Loading Rifle Barrels are premium quality barrels in every …PPS-43 and PPS-43/52 barrel. New manufacture, chambered in 9x19. Made to original PPS-43 specifications (expect in 9mm). 9.75in length. These barrel will not fit the Pioneers Arms PPS43c. New manufacture PPS-43 barrels. Chambered in 9mm (9x19). Made to original military specs. These barrels will fit Russian, Polish and Chinese PPS-43's.We would like to show you a description here but the site won’t allow us.48. Reaction score. 0. Oct 23, 2017. #1. I just bought my 1st inline muzzleloader after discussing things somewhat with a friend. Green Mountain barrels, Timney Triggers and B/C stock on the early Knights had me intrigued. I quick internet search and I found a Knight MK-85 in what appears to be stainless with a standard black stock and a ...Tipton Brass Cleaning Jags. .920 Diameter Ruger 10/22 20" Bull Barrel Stainless Finish by GREEN MOUNTAIN BARRELS .22 LR. High grade 10/22 target barrel 1:16" twist Bentz 22LR match chamber Drop-in replacement for Ruger 10-22 .920" bull barrel stock Not recommended for Stinger or Subsonic ammo.Plastic barrels have become a hot item in recent years for catching rainwater that can be reused and re-purposed for all kinds of things. The barrels come in a variety of sizes. Th...Jan 1, 2017. Messages. 10. Reaction score. 0. May 26, 2018. #1. How difficult would it be to buy a threaded 50 caliber 1:28 twist barrel from Green mountain and a breech plug from Track of the Wolf and assemble a fast twist TC Hawken barrel? GM sells a 1"x32" 1:28 twist threaded barrel for $115 and Track sells a breech plug for $45.Green Mountain Rifle Barrel Co. P.O. Box 2670, 153 West Main St. Conway, NH 03818 P: (603)447-1095 F: (603)447-1099 So if you don’t buy it directly from G.M. You are pretty much on your own. I purchased this from Cabela’s and no longer have the receipt plus I’m sure cabela’s would only allow an exchange at best.Green Mountain Muzzleloading Barrels Home · Contact Us · Support & Info. · Policies · Shopping Cart · PRODUCTS: Specials: Muzzleloading Rifles: Muzzleloading Shotguns: Revolvers: Pistols: Accessories: Cleaning Supplies/Chemicals: Shooting Supplies ... Muzzleloader Barrels: 6A-15036 $145.00.A Green Mountain Barrel would be a great upgrade for your favorite target, competition, or small varmint hunting rimfire rifle. Like all Green Mountain barrels these are proudly made in the USA. Specs: Length: 24". Profile: Fluted Tapered. Rifling: Button. Twist Rate: 1:16. Material: 416 Stainless. Weight: 2.15 pounds.Green Mountain Muzzle Loading Rifle Barrels are machined from high quality American made bar stock, A.I.S.I. 1137 modified, stress relieved, annealed, certified rifle barrel quality steel. All barrels are drilled from solid stock, reamed to a high degree of smoothness, then optically checked for straightness. Very close tolerances are maintained.A Green Mountain Barrel would be a great upgrade for your favorite target, competition, or small varmint hunting rimfire rifle. Like all Green Mountain barrels these are proudly made in the USA. Specs: Length: 20". Profile: Fluted Tapered. Rifling: Button. Twist Rate: 1:16. Material: 416 Stainless. Weight: 1.9 pounds.Pistol Barrel Blanks Breech Plugs : Barrels . See the links at the right for more barrels. Colerain Jeager Swamped Barrels 50, 54, 58 62 cal. 1 1/16" at breech, 31" long. Breech plug installed. $275.00 Rice $320.00. Colerain Harpers Ferry Barrel 54 cal. Octagon to round. 33" long. Breech plug installed. $275.00 Rice $320.00. Blunderbus BarrelI need a bit more info before I run down this rabbit hole, especially, since my my new barrel and returned Ruger , are shooting good now. Green Mountain Rifle Barrel Co. PO BOX 2670. 153 West Main St. Conway, NH 03818. Telephone: 603-447-1095. Customer Service Hours: Mon. - Fri. 7AM to 5:15PM EST.Feb 16, 2018 ... If you're talking about the drop in barrels for TC (and other) guns, Green Mountain made two types; the 1:70" twist for round balls (.50 ...We would like to show you a description here but the site won’t allow us.Green Mountain Ruger 10/22 18" .920 Bull Barrel, Threaded or Unthreaded: Volquartsen Recoil Rod Spring Kit - MKII, MKIII, MKIV & 22/45 ... This Green Mountain barrel is a 16.5" Fluted Sporter barrel for that will fit the standard stock of the Ruger 10/22 in .22 LR. Stainless Steel(photo not currently available) with 1:16 twist. ...Green Mountain 28" Blued Tapered Barrel Ruger 10/22, TCR22 Rifle. Green Mountain manufactures some of the highest quality Ruger 10/22 22lr barrels on the market. Their barrels provide match grade accuracy and premium materials in an affordable package. All of Green Mountain barrels for the Ruger 10/22 are 1:16”...Oct 3, 2011. 1,037. 21. Central Houston. Upon the request of a few members in other threads to dicuss "cheap" 10/22 replacement barrels, I wanted to post up my 10/22 results with a green mountain barrel. The 10/22 is in the factory stock, no bedding or pillars, barrel channel opened for the .920 bull barrel - supported at the stock tip with a ...Based on the success of padom and others with straight taper green mountain barrels spun up by manzella using the eachus chamber on rim-x builds, I'm wondering if anyone has tried this combination with a 457. Seems like they hammer and could provide a good "budget" option. I did some searching and couldn't come up with much.All .22's are ammo picky. Try the ammo listed in suggested post, and include some Center-X. I have found that torque settings are very important when it comes to accuracy with the 10/22 rifle. My suggestion is to get a brick of each and start each test with a clean barrel. Shoot at least 10 five shot groups to make sure the barrel is seasoned ...Jun 25, 2020 ... New Employees, New Barrels, Keeping Busy! ... Step 8 Colonial Kit Barrel Draw ... Step 3 SMR Fitting the Buttplate on the Southern Mountain Rifle ...A stainless steel barrel with a heavy contour and a 1:16 twist for improved accuracy and …We would like to show you a description here but the site won’t allow us.Green Mountain has expanded several times over the years to its current 32,000-square-foot facility with 50 employees making 15,000 barrels a month. The company was sold to Knight Rifles in 1995 to be a captive supplier, but Knight was sold to the Pradco Division of Ebsco Industries a year or two later.Quote from: Windriverbob on January 10, 2013, 09:31:27 PM. I have a new rifle sporting a Green Mountain .50 cal. barrel. Range testing so far has indicated a .490 RB with some .018 JC Pennys pillow ticking gives a nice fit and the patches are almost reusable. 70 & 80 grain charges of Swiss 3F black powder have not produced a …We would like to show you a description here but the site won’t allow us.Straight Octagonal Rifle Barrels by Green Mountain: ORDER # CALIBER: WIDTH: LENGTH: THREADED: TWIST: PRICE: 134042: 0.40: 13/16″ 42″ 5/8″ x 18TPI: 1 in 48″ $197.95: 134536: 0.45: 13/16″ 36″ 5/8″ x 18TPI: 1 in 48″ $185.95: 134542: 0.45: 13/16″ 42″ 5/8″ x 16TPI: 1 in 60″ $197.95: 74542: 0.45: 7/8″ 42″ 5/8″ x 18TPI: 1 ...The Green Mountain Rifle Barrel Company started out making high-end muzzleloader barrels but has since broadened its scope and carved out a much bigger piece of the rifle barrel market.. Founded in 1976 by Branch Meanly, Green Mountain initially moved from muzzleloader barrels into contract sales. Today, the company …Nov 27, 2007. #3. What Zonie said, also the Green Mountian, and Colerain barrels are of a harder steel than the Rice, making them a little harder to cut dovetails, and engrave. If you don't mind the extra work, and elbow grease then the GM is the best deal. For the price the Rice is the best buy, as it also comes with a fitted breech plug, so ...12,478. 8,698. Southeastern, Pennsylvania. Mar 25, 2019. #1. Keystone Accuracy did a 12" AR15 22LR upper with a Green Mountain blank for me last year and it's very accurate. I asked Keystone Accuracy to spin up and custom fit me one of his Green Mountain 22 rimfire blanks for my CZ 455. John happened to have an already contoured blank on the ...Cracker Barrel is not just known for its delicious comfort food and cozy country atmosphere, but also for its unique shopping experience. When you step into a Cracker Barrel store,...Green Mountain 20" Blued Bull Barrel Ruger 10/22, TCR22 Rifle. Green Mountain manufactures some of the highest quality Ruger 10/22 22lr barrels on the market. Their barrels provide match grade accuracy and premium materials in an affordable package. All of Green Mountain barrels for the Ruger 10/22 are 1:16”...PPS-43 and PPS-43/52 barrel. New manufacture, chambered in 9x19. Made to original PPS-43 specifications (expect in 9mm). 9.75in length. These barrel will not fit the Pioneers Arms PPS43c. New manufacture PPS-43 barrels. Chambered in 9mm (9x19). Made to original military specs. These barrels will fit Russian, Polish and Chinese PPS-43's.Jan 12, 2024 · A Green Mountain Barrel would be a great upgrade for your favorite target, competition, or small varmint hunting rimfire rifle. Like all Green Mountain barrels these are proudly made in the USA. Specs: Length: 24". Profile: .920" Bull. Rifling: Button. Twist Rate: 1:16. Material: 416 Stainless. Weight: 4.1 pounds. Green Mountain Barrel. by JD, from MS, United States Written on July 27, 2023. After installing the barrel on my 10/22 , i sighted in at 25 yards, once that was accomplished I moved back to 50 yards for groups. The first group was 1/2” , the second group was just under 1/2”. That’s with CCI standard velocity 40 grain.GM barrels can be hit or miss (no pun intended). You may get one that shoots really good or you may not. I'm a firm believer in spending a few more dollars to get a barrel with guaranteed accuracy. You can get a nice heavy target Kidd barrel for $200 with a 1/2" @50 yard guarantee. Feddersen barrels you can get for around $160 and …Jun 25, 2020 ... New Employees, New Barrels, Keeping Busy! ... Step 8 Colonial Kit Barrel Draw ... Step 3 SMR Fitting the Buttplate on the Southern Mountain Rifle ...The web page for Green Mountain Barrels, a manufacturer of rifle barrels, is no longer …We would like to show you a description here but the site won’t allow us.Pistol Barrel Blanks Breech Plugs : Barrels . See the links at the right for more barrels. Colerain Jeager Swamped Barrels 50, 54, 58 62 cal. 1 1/16" at breech, 31" long. Breech plug installed. $275.00 Rice $320.00. Colerain Harpers Ferry Barrel 54 cal. Octagon to round. 33" long. Breech plug installed. $275.00 Rice $320.00. Blunderbus BarrelAIMS 74 Barrel made by Green Mountain. Price: $149.99 View product. AK 47 Rifle Barrel Green Mountain Parts & Accessories. AK 47 Rifle Barrel Green Mountain- 14x1 LH Thread. Price: $139.00 View product. Contacts. Atlantic Firearms,llc 10337 Bunting Road Bishopville, MD 21813 ...A Better Barrel. Several world records, in multiple shooting disciplines, have been set with Hart Rifle Barrels. Custom made. One at a time. Every barrel we make is individually. crafted, one at a time, for extreme accuracy. We do not sell a "second-best." Made for competitors. By competitors. Green Mountain Barrel Ruger 77/22 22 Long Rifle Factory Contour 1 in 16" Twist 20" Fluted Blue. Product #: 885580. Manufacturer #: 901678. UPC #: 197706885580. Green Mountain 17" Blue Heavy Tapered Barrel Ruger 10/22, TCR22 Rifle. $212.74. $13.72 shipping. 7 watching. Great deals on Green Mountain Rifle Parts. Trick out or upgrade your firearm with the largest gun parts selection at eBay.com. Fast & …We would like to show you a description here but the site won’t allow us.As to Midway's Green Mountain barrel, haven't bought one. However, a shooting buddy has bought a couple of Green Mountain fluted stainless F54 contour 308 win (for a mauser action Zavasta rifles) barrels from Midway in the last several months.. He's retired and spends quite a lot of time tinkering with rifles, reloading and shooting.Bits of Pieces are distributors of: Schaftol Premium German stock oil Green Mountain rifle barrels McGowan Precision Barrels Trading as Bits of Pieces, ...PPS-43 and PPS-43/52 barrel. New manufacture, chambered in 9x19. Made to original PPS-43 specifications (expect in 9mm). 9.75in length. These barrel will not fit the Pioneers Arms PPS43c. New manufacture PPS-43 barrels. Chambered in 9mm (9x19). Made to original military specs. These barrels will fit Russian, Polish and Chinese PPS-43's.Jan 25, 2016 ... In this post I'll be turning down a Green Mountain Barrels chrome moly blank to a (slightly modified) Remington Varmint Contour. The barrel ...Straight Octagonal Rifle Barrels by Green Mountain: ORDER # CALIBER: WIDTH: LENGTH: THREADED: TWIST: PRICE: 134042: 0.40: 13/16″ 42″ 5/8″ x 18TPI: 1 in 48″ $197.95: 134536: 0.45: 13/16″ 36″ 5/8″ x 18TPI: 1 in 48″ $185.95: 134542: 0.45: 13/16″ 42″ 5/8″ x 16TPI: 1 in 60″ $197.95: 74542: 0.45: 7/8″ 42″ 5/8″ x 18TPI: 1 ...if the link's not working, here's the skinny-. The stinger barrel is .920"x20" with a 1:18 twist, the ad states that it is specifically designed for 22 stingers and other HV 22LR ammo. The Subsonic barrel is .920"x20" with a 1:9 twist, the ad states that it is specifically designed for subsonic match stuff like green tag and wolf match.When it comes to shopping for furniture and home decor, one name that often comes to mind is Crate and Barrel. With its wide range of products and stylish designs, this popular sto...We would like to show you a description here but the site won’t allow us.A Green Mountain Barrel would be a great upgrade for your favorite target, competition, or small varmint hunting rimfire rifle. Like all Green Mountain barrels these are proudly made in the USA. Specs: Length: 24". Profile: .920" Bull. Rifling: Button. Twist Rate: 1:16. Material: 416 Stainless. Weight: 4.1 pounds.Every Green Mountain 10/22 barrel goes through rigorous inspection to assure you of unmatched quality. A Bentz semi-auto match chamber is used for enhanced quality. The .920 heavy Green Mountain 10/22 rifle barrel is offered in blued or stainless steel and plain or fluted. $180.59. or 4 interest-free payments of $45.15 with.Green Mountain Barrels Rayl Pistol Barrels Rice Barrels. Facebook. How to Order. We are happy to fill your order via telephone. We will tell you upfront if your parts are on hand, your total and when you can expect your package. Please be aware we are a family mail order business and we do not maintain a conventional store that you can visit.Check out the GREEN MOUNTAIN available Online at Brownells Today and many more …Green Mountain Barrel Mauser Series 3 308 Winchester F54 Contour 1 in 10" Twist 24" Fluted Stainless Steel. Due to safety considerations and legal/regulatory reasons, 80% Lower Receivers/Frames, Receiver Blanks and Receiver Flats may not be returned. Defective items must be returned to the manufacturer.Cracker Barrel is not just a popular restaurant chain known for its delicious comfort food; it also has an extensive gift shop filled with unique and charming merchandise. When it ...
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We would like to show you a description here but the site won’t allow us.Green Mountain barrel Have you "bedded" the action with tape fore and aft yet. That helped my immensely!!! I have the 18" GM barrel but have not had time to check it at 50 yards yet. Was able to shoot with the GM barrel at 100 meters and was getting 1" plus or minus a bit. First shots through the barrel after a thorough cleaning and installation.The GM-M52 18-inch-long fluted AR-15 barrel from Green Mountain, chambered in .223 Wylde, is made from 416 stainless steel with a bead blast matte finish that has been black passivated. It features a 1:8 twist, 1/2x28 muzzle threads and is compatible with a .750-inch gas block and rifle-length gas tube. The barrel is button …Sep 28, 2017. #1. I am looking into Green Mountain Barrels. They are a buttoned rifle company, and from what I can tell do alot of OEM work. Their production methods look similar to Shillen, Criterion, Lilja, Bergarra and Pac-Nor. Typcially buttoned barrels are not quite as good as cut rifling, like Kreiger, Bartlein, Obermeyer, etc., but ...Between the 18" and 20" ones from GM, the shorter seems a bit better upon initial assembly and one range outing - no tweaking. BlkHawk73, thanks for the comment! Another thing I was wondering was whether or not a sporter barrel from Green Mountain or E.R. Shaw would fit in something like say, a Hogue overmolded stock with the factory …BP0222 Green Mountain Rifle Barrel - 1" X .58 Caliber X 36" Length. Machined from finest quality American round bar stock, pre-straightened before drilling to assure minimum run out. After drilling, all barrels are reamed three times then burnished for highest quality bore finish. Rifled with 8 lands and 8 grooves with a nominal groove depth of ...Barrel length is really not a big factor in accuracy but the shorter tubes can actually be a little more accurate because shorter=stiffer. My 16.5 stainless fluted Green Mountain barrel is a shooter. I have gotten repeatable 1/2 groups at 50 yards with Super X 37 grain hollow points the barrel liked.A review of a 22" stainless steel barrel from Green Mountain Rifle Barrel Company, used to build a long range precision AR rifle. The review includes test results, accuracy, velocity, and comparison with other ammunition.On 10/6/2014 at 9:55 AM, TwoShot said: Does anyone have experience with Green Mountain AR barrels? They have 18" fluted barrels weighing 34 oz. 1:8 twist with NATO chamber for $180. I have a rifle that was built with a …We would like to show you a description here but the site won’t allow us.Jun 25, 2020 ... New Employees, New Barrels, Keeping Busy! ... Step 8 Colonial Kit Barrel Draw ... Step 3 SMR Fitting the Buttplate on the Southern Mountain Rifle ...Green Mountain 28" Stainless Bull Barrel Ruger 10/22, TCR22 Rifle. Opens in a new window or tab. Brand New. $252.99. rsprecisionsportsllc (13,145) 99.6%. Buy It Now +$15.87 shipping. 57 watchers. Ruger 10/22 OEM 18.5" FDE CERAKOTED Rifle Barrel with Adjustable Sights BLEM. Opens in a new window or tab. New (Other)All of Green Mountain barrels for the Ruger 10/22 in 22LR feature a Bentz chamber that greatly improves accuracy over factory rifle barrels. Specs: 22LR Stinger Chambered. Length: 20". Profile: .920" Bull. Rifling: Button. Twist Rate: 1:18. Material: 4140. Weight: 3.4 pounds. Green Mountain Muzzle Loading Pistol Barrels are machined from high quality American made bar stock, A.I.S.I. 1137 modified, stress relieved, annealed, certified rifle barrel quality steel. All barrels are drilled from solid stock, reamed to a high degree of smoothness, then optically checked for straightness. Very close tolerances are maintained. Green Mountain Muzzle Loading Pistol Barrels are machined from high quality American made bar stock, A.I.S.I. 1137 modified, stress relieved, annealed, certified rifle barrel quality steel. All barrels are drilled from solid stock, reamed to a high degree of smoothness, then optically checked for straightness. Very close tolerances are maintained.All of Green Mountain barrels for the Ruger 10/22 in 22LR feature a Bentz chamber that greatly improves accuracy over factory rifle barrels. Specs: 22LR Stinger Chambered. Length: 20". Profile: .920" Bull. Rifling: Button. Twist …Pistol Barrel Blanks Breech Plugs : Barrels . See the links at the right for more barrels. Colerain Jeager Swamped Barrels 50, 54, 58 62 cal. 1 1/16" at breech, 31" long. Breech plug installed. $275.00 Rice $320.00. Colerain Harpers Ferry Barrel 54 cal. Octagon to round. 33" long. Breech plug installed. $275.00 Rice $320.00. Blunderbus BarrelIf you’re looking for a versatile container that can handle a variety of industrial and personal needs, then the 55 gal blue plastic barrel is an excellent choice. One of the most ...The Hide Armory. The Armory. Sniper’s Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper’s Hide has been offering informational videos, podcasts, and other support to its users in one location. Forum Statistics.Green Mountain Barrel Blank 50 Caliber Muzzleloading Black Powder Rifle 7/8" Straight Octagon 1 in 70" Twist 36" 1137 Chrome Moly in the White. Product #: 616070. Manufacturer #: 75036..