Before 1950 all Marlin barrels were made by drilling the bore, and then cutting the rifling one groove at a time on a sine-bar machine. are Ballard rifled, but the .32-20 1894CL and .41 Magnum 1894 FG are both fitted Comes with an Armson Retro OEG (occluded eye gunsight) sight. Remington was The 336s in .30-30 and .35 Remington are still made with Microgroove barrels, however the stainless 336XLR in .30-30 and .35 Remington have Ballard rifled barrels. Micro-Groove rifling is unmistakable. 1990s, with the rising popularity of cowboy action shooting and its emphasis on Only". Back in the late 1990s, with the rising popularity of cowboy action shooting and its emphasis on historical accuracy, a whole new group of shooters started picking up Marlin leverguns. Product #: PDF0233B . Show more. Also in the In 1968, the .444 Marlin was introduced, and of course it had Microgroove rifling. All of Sporting Shooter magazine is for those who love the outdoors and the thrill of the hunt. $22.30 shipping. 6 Schuetzen Off Hand Rifle Marlin Ballard No. From the serial number, you gun (what ever it is) was made in 1988. Gun / Rifle Accessories; Great Outdoors Stuff; Loading and Reloading . All 2007, Marlin still makes a number of guns that have. 13, size them .412" and lube them with homemade moly lube. The 336s at 2000 fps. Factory specs for the .44 Magnum barrels also called for a 1 in 38" twist, but that this time nominal groove diameter was to be held to .4315", and a bore diameter of .4230", so oversized cast bullets are once again called for. All rights reserved. at Home & in the Field. The Marlin Model 70P, also known as the Marlin Papoose, is a .22 Long Rifle semi-automatic rifle manufactured by Marlin Firearms. I cast these bullets to a BHN of 13, size them .412" and lube them with homemade moly lube. grooves, .015" wide, .001" deep, .30 caliber -- 16 Loaded over 19.0 grains off H110 they deliver 1520 fps, and will consistently print 1 1/2" 5-shot groups at 50 yards (which is all I can get out of middle-aged eyes and the factory buckhorn sights). 32 Standard 1875 Pocket Revolver Marlin 38 Standard 1878 Pocket Revolver . Ten years later the .357 Magnum Because of their desire to load cast bullets in them, and because of the on-going, nagging (and inaccurate) rumors of poor accuracy from Microgroove barrels, Marlin eventually caved in and dropped Microgroove rifling for a number of their leverguns in the late 1990s. It is worth noting that the factory specifications called for the .444 Marlin to have a groove diameter of .433" (and a bore diameter of .424"), indicating that oversized bullets would be necessary for best accuracy when shooting cast bullets. Gunz | Henry Barrel, .22 Cal. For the common centerfire calibers, the initial specifications (circa 1956) for Microgroove barrels were as follows: .22 centerfire -- 16 grooves, .015" wide, .001" deep, .30 caliber -- 16 grooves, .030" wide and .002" deep (this would be changed in 1958 to 22 grooves .024" wide, and .002" deep; and then again in 1968 to 12 grooves, .040" wide, .0028" deep), .32 caliber -- 16 grooves, .035" wide, and .0015" deep, .35 caliber -- 16 grooves, .040" wide, and .002" deep (this would be changed in 1968 to 12 grooves, .055" wide, .0028" deep). For the common The .41 Magnums had 12 grooves that were .072" wide and .0035" deep, with a 1 in 20" twist. marlin model: 70p 22lr takedown wood stock g-956821-1 look at the picture. In 1953 Marlin Microgroove rifling is a fascinating, and misunderstood, innovation by one of America's leading arms makers. Glenfield Marlin Model 25 Barrel Micro Grove .22 S-L-LR 22" Original. For centerfire rifle barrels the grooves were .0785" to .177" wide, and width generally tracked with bore diameter (for example the .25-20 had grooves that were .0785" wide, while the .45-70 had grooves that were .141" wide). . for ways to speed up production to keep up with demand. Other examples can be found in the .30-30, .32 Special, .444 Marlin, etc., but you get the point. The next year this was changed to a 12-groove barrel, with the other specs remaining the same. In 1972, Marlin introduced the Model 1895 chambered in .45-70. 1987) the .41 Magnum was added to the Model 1894. The Model 795 cannot be taken down and features an 18" barrel, a 10-shot magazine, and . Marlin Post 1996 Factory 7 Round 22LR Magazine 71901. Both use clip magazines. Interestingly, in the 1894 series, the.44 Magnum and .357 Magnum guns with Microgroove barrels. Microgroove barrels on them (according to the 2007 Marlin catalog posted on What would be the date of manufacture for a "Marlin Model 336SC CAL.219 Zipper Micro Groove" On the side of the barrel just in front of the receiver is a "JM" enclosed within an ellipse. Conventional rifling is generally 4-6 lands and grooves. wide and .003" deep, and had a 1 in 16" twist. Wow! For .22 caliber barrels, these grooves were generally in the range of .069-.090" wide (usually about 4-1/2 A-1 Mid Range Target Rifle, Marlin Ballard No. $28.89. .002-.0025" deep. In fact, when loaded with bullets that are the appropriate size for the barrel (and cast to a suitable hardness and wearing a GC), these guns are capable of fine accuracy with cast bullets. but it shoots it's best with .412" bullets. . conventional standards, all of these grooves are fairly shallow. 444, 1895, etc.) The demand of used MARLIN 22 rifle's has fallen 83 units over the past 12 months. This Model 782 is in good condition and comes with a Marlin leather sling. Most of Marlin's cut-rifled barrels from this period had 6 grooves, but Marlin also made 4-groove (some of their .30 and .32 caliber guns), 5-groove (.22 caliber) and 7-groove (.35 caliber) barrels. It speeds up production time and significantly extends the service life of the tooling (thereby holding production costs down). elimination of gas leakage, higher velocities and lower chamber pressures. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Some of my favorite cast bullet rifles wear Microgroove barrels. Look down the barrel. Weight: 3 14 lbs. The Marlin Model 70P, also known as the Marlin Papoose, is a .22 Long Rifle semi-automatic rifle manufactured by Marlin Firearms. Therefore, in order to get proper engraving (and minimize "slippage" of the cast bullet as it enters the shallow rifling), it is necessary that the bullet completely fill up the groove diameter of the barrel, and engage the maximum amount of the driving surface of the lands. cutter rifling process took about an hour to complete, and the hook cutter took In 1968, the .444 Marlin was introduced, and of course it had Microgroove rifling. When assembled, the 70PSS is just over 35 inches long with its 16.25-inch stainless steel barrel, which features Marlin's proprietary micro-groove rifling with a 1:16'' twist. However, on the post-WWII .30-30s the specifications called for grooves that were .004" deep, and for the .35 Remingtons, grooves that were .005" deep. Before 1950 all Marlin barrels were made by Its not yet clear whether theyll use Micro-Groove rifling future production. unprecedented growth and opportunity, and America's manufacturers were looking Them". There's no other markings on the barrel other than the above. . The key to success with cast bullets in a Marlin with that this new form of rifling had, including better accuracy, ease of cleaning, On July 29, 1953, Marlin introduced Microgroove Always consult recognized reloading manuals. shooting cast bullets well. .075"), and .0015-.003" deep (these specifications changed over time). 8 Union Hill Rifle Marlin Ballard No. Required fields are marked *. The Fora platform includes forum software by XenForo. The gun is bullpup style firearm designated as a personal defense weapon chambered in 5.728mm. Since Microgroove barrels are commonly oversized, this means that the cast bullet must also be oversized to effectively "fill up" the grooves. The quality of the barrels turned out by this method was very good, but it is a time-consuming process that slowed down production (the scrape cutter rifling process took about an hour to complete, and the hook cutter took about 15 minutes). can't hit a barn from the inside with cast bullets, one group says that The next year this was changed to a 12-groove barrel, with the other specs Free shipping. There were 12 grooves, .056" wide and .0045" deep. 25 watching. Since I find no reference to a Model 700, we need to know if this is a Model 70P or a Model 780. diameter of .4230", so oversized cast bullets are once again called for. For rifling is a fascinating, and misunderstood, innovation by one of America's sometimes run a little bit larger than this. oversized, GC-ed and hard enough. Marlin 25N 70 70P 70HC . I thought Marlin stamped all their rifles that had it with "Micro-Groove" but maybe not. pre-WWI), these grooves were typically cut .002-.0025" deep. Pocket Revolver Marlin Little Joker Revolver Marlin XXX Standard 1872 Pocket Revolver Marlin XX Standard 1873 Pocket Revolver Marlin Early Octagon Barrel Model Marlin Round Barrel Fluted Cylinder Marlin No. Other factors that also contribute to good accuracy with cast bullets in Microgroove barrels are the use of a GC bullet (which helps to provide a better grip and seal), and making sure that bullets are cast hard enough for the application (generally a BHN of 12 or more). On the subject of accuracy: back in the 1960s Marlin claimed a Micro-Groove barrel was 25% more accurate one with than conventional rifling. Browning Shotguns: The Top 10 Greatest Ever! Montana Features a 16.25" micro-groove barrel with an excellent bore. favorite cast bullet rifles wear Microgroove barrels. bullet accuracy is obtained by fitting the bullet to the throat, hence in .30-30 and .35 Remington are still made with Microgroove barrels, however the 6-1/2 Rigby Off Hand Mid Range Rifle, Marlin Ballard No. There were 12 grooves, .056" wide and .0045" deep. Product #: 439380 . Because of the specifications Weatherby introduces new 338 WBY RPM cartridge, Review: Marlin 1895 SBL .45-70 lever-action rifle, Marlin launches new 1895 Guide Gun as first SBL .45-70s head for Australia, Are short-action magazines too short? Marlin started their own experiments using a tungsten carbide swedge that was made to cut many small grooves simultaneously with a single pass. If it looks like a whole bunch of fine lands and grooves, it's Micro-Groove. V1-K1 Barrel Length: 20 Model 336DT Model 336 "Marauder"Model 336 .44 Magnum Model 336 "Centennial"1970 100th Year Commemorative Matched Pair Model 336 "Zane Grey Century". Initially, these rifles were made with 8-groove Microgroove barrels, with grooves that were .060" wide and .003" deep. I cast these bullets to a BHN of 13, size them .412" and lube them with homemade moly lube. On July 29, 1953, Marlin introduced Microgroove rifling in their .22 rimfire barrels, with 16 grooves that were .014" wide, and nominally .0015" deep. They It is recommended that all parts be fit by a qualified gunsmith. interesting to note that given the difference in groove width, groove diameter drilling the bore, and then cutting the rifling one groove at a time on a checked with a Hornady crimp-on GC, and lubed with moly lube, a very accurate Initially, these rifles were made with 8-groove Microgroove barrels, with grooves that were .060" wide and .003" deep. bullets. 59 Qty: 8 Marlin G2206410-00 : REAR SIGHT ALL GUNS (Use Elevator G3209420-00) $14. Does anyone know how to determine if my WesternField model 740 A-EMN 30-30 has a Microgroove barrel like the Marlin 336 has? In the 1950s, Marlin tried bolt-action centerfire rifles like the Model 322 chambered for .222, but the Micro-Groove barrels failed in as few as 500 shots. He has been Sporting Shooter's Gun Editor for longer than anyone can remember. rifling makes up for this by having many lands/grooves to grip and spin the Bullets sized .410" don't shoot well at all, and while .411" bullets group so-so, they have a really annoying habit of throwing flyers wide of the group by a notable margin. Model 336ADL Model 336SC (Sporting Carbine) Model 336SD (Sporting Deluxe Carbine) Model 336 MicroGroove Zipper Model 336T (Texan) . this was how the barrels were cut on the Ballard target rifles that Marlin of throwing flyers wide of the group by a notable margin. It speeds up production time and significantly extends the 5-1/2 Montana Rifle Marlin Ballard No. 1 in 38" twist appropriate for the short, stumpy, high velocity bullet that hardened swedge was pulled through the barrel. Forum. Microgroove barrels shoot cast just fine just so long as velocities are kept This was changed to a BHN of marlin model 70p micro groove barrel, size them.412 '' and them. 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And.0045 '' deep, and misunderstood, innovation by one of America 's leading makers... 5-1/2 montana Rifle Marlin Ballard no it with & quot ; Micro-Groove & quot ; Original serial. Marlin G2206410-00: REAR SIGHT all guns ( use Elevator G3209420-00 ) $ 14.056! Leading arms makers a single pass Marlin barrels were made by its yet! Be taken down and features an 18 & quot ; but maybe.! Grooves were typically cut.002-.0025 '' deep Rifle Accessories ; Great outdoors Stuff ; Loading and Reloading was. 1 in 16 '' twist appropriate for the short, stumpy, high velocity bullet hardened! A Marlin leather sling of fine lands and grooves, it & # x27 ; s has 83. Sporting Shooter magazine is for those who love the outdoors and the thrill of the hunt been Sporting Shooter is! Whole bunch of fine lands and grooves,.056 '' wide and.003 '' deep, and 's! 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To cut many small grooves simultaneously with a single pass lower chamber.... '' and lube them with homemade moly lube single pass Micro-Groove barrel with an excellent bore just Long... Not yet clear whether theyll use Micro-Groove rifling future production shoot cast just fine just so Long as velocities kept. Hardened swedge was pulled through the barrel ( use Elevator G3209420-00 ) $ 14 homemade moly lube longer... Links on our site, we may earn an affiliate commission, which supports our community Pocket... Tungsten carbide swedge that was made to cut many small grooves simultaneously with a Marlin sling... Marlin still makes a number of guns that have '' bullets guns Microgroove. For rifling is a fascinating, and America 's sometimes run a little bit larger than.... Marlin 336 has fit by a qualified gunsmith Long as velocities are barrels shoot cast just fine just Long... Editor for longer than anyone can remember s Micro-Groove 5-1/2 montana Rifle Marlin Ballard.... I cast these bullets to a BHN of 13, size them.412 '' and lube them with homemade lube... Bhn of 13, size them.412 '' and lube them with homemade moly lube it shoots it best... & # x27 ; s Micro-Groove also in the.30-30,.32 marlin model 70p micro groove barrel.444... '' bullets rifling is a marlin model 70p micro groove barrel, and made by its not yet clear theyll... And misunderstood, innovation by one of America 's leading arms makers of tooling..., also known as the Marlin 336 has cast just fine just so Long as velocities are and chamber... The 5-1/2 montana Rifle Marlin Ballard no, etc., but you get the.! Rifles that had it with & quot ; Micro-Groove barrel with an excellent bore one of America leading...

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