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Does the 1971 model Glenfield 25 have Microgroove rifling?
most likely it is. marlin (glenfield is marlin) began using micro-grove technology in 1953.
What is the age of a 22 WMR Marlin 782 micro-groove barrel serial 22755171?
1978 is the exact year. To find the year of manufacture subtract the first two digits from 100, that will give you the year. Hence, 100 - 22 = 78, so that rifle was manufactured in 1978. Marlin is still using this system currently so firearms made this year 2009, will start with the serial number 91, 100 - 09 = 91.
What is the age of a 22 WMR Marlin 782 micro groove barrel serial 22755171?
1978 is the exact year. To find the year of manufacture subtract the first two digits from 100, that will give you the year. Hence, 100 - 22 = 78, so that rifle was manufactured in 1978. Marlin is still using this system currently so firearms made this year 2009, will start with the serial number 91, 100 - 09 = 91.
Marlin model 60 micro groove barrell need info about it?
This is a 16-groove rifled barrel, in Marlin's trademarked Micro-Groove rifling. This rifling, with its precision-crowned muzzle, gave the Model 60 an enhanced accuracy over competing rifles using traditional deep grooved rifling, as the bullet was not as severely deformed while traveling down the barrel as with competing 22 LR rifles. The twist rate is 1:16 inches, right-hand. Micro-Groove rifling uses many small lands and grooves rather than 2, 4, or 6 deeper grooves used in the majority of rifles. This arguably adds to the accuracy of the rifle through lessening the deforming of fired bullets traveling down the barrel and indeed the Model 60's reputation for accuracy would seem to bear this out. Although the Model 60 is one of the least expensive 22 semi-automatic rifles sold, it is one of the most accurate examples of a .22 caliber semi-automatic rifle ever produced, due to the 16 groove Micro-Groove rifling. Hope that this helps- Shooty
What is the accuracy of a Marlin 1894 in 357?
With jacketed bullets, 158 gr and heavier, I get 1.5" groups at 100 yds. The earlier micro-groove barrels were abysmal with cast bullets so Marlin switched to a more conventional rifling design. I have shot both style of barrels and both shoot very well with jacketed bullets. With hand-loads I have gotten groups as small as 1" using a 4X scope.
What year did Marlin transition from Microgroove rifling to Ballard style in the 444 SS and did Marlin produce the 444 SS with Ballard rifling in a 1 in 38 twist or just 1 in 20?
Not sure when they went from micro-groove to Ballard type but they went to micro-groove rifling around 1954,a 1 in 38 twist is standard for most .44 Magnum &.444 but with some ammo makers making factory loads that use bullets that weigh more then 240grns. in weight buy a Ruger Deerfield simi-auto .44 magnum or their lever action .44 magnums because they have a rifling twist of 1 in 18 that will stabilize the heavier 300grn.plus bullets and don't use the micro-groove rifling,also leading can be a problem in micro-groove barrels if your using soft lead and load them to more then 1200 feet per second so for that reason your better off to stick with jacketed bullets of not more then 240 grains when loading ammo for rifles with micro-groove barrels with the 1-38 twist if your going to be using heavy loads.Hope this info can be of some help to somebody, I have also noticed that the Ruger Deerfield rifle with the faster rifling twist gives a better bullet mushroom as opposed to the old 1-38 twist.If you'd like to learn a little more about this fascinating topic,type rifling characteristics into a search with Google and you will find a lot of interesting information on different types of rifling used by different manufacturers. New .444's now have a 1 in 20 twist. I hope they do the same in the .44 Mag soon. The 1 in 20 will stabilize 300 grain bullets while the 1 in 38 will not.
What is a sentence using word groove?
There is only one groove on a vinyl phonograph record. A bowling lane has a groove that keeps catching my ball.
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using your hands whisly
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