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Mini 30 Ammo ?
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HighVelocity
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I shot a bunch of Wolf in my Mini-30 with no problems.
Err.....
As far as I know, ALL 7.62x39 should have a nominal bullet diameter of .311, as this standard for this caliber. You can load .308 bullets but accuracy suffers in MOST guns. The Mini-30, however if supposed to have the ability to shoot BOTH .311 and .308, IIRC because of the dimensions of the throat. Usually only an issue if you handload, and want to use .308 bullets instead of the "normal" .311
As far as I know, ALL 7.62x39 should have a nominal bullet diameter of .311, as this standard for this caliber. You can load .308 bullets but accuracy suffers in MOST guns. The Mini-30, however if supposed to have the ability to shoot BOTH .311 and .308, IIRC because of the dimensions of the throat. Usually only an issue if you handload, and want to use .308 bullets instead of the "normal" .311
mainmech48
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Virtually all surplus or commercially loaded 7.62x39 ammo will have a bullet that matches the nominal 0.311-0.312" specification for the cartridge.
Ruger, in a bid to expand the handloading options for Mini-30 buyers, designed compromise bore and chamber specs which allowed both mil-spec and 0.308" bullets to be used with safety and at least tolerable accuracy.
IIRC, there is a gradual taper from chamber to bore in the Ruger barrel to accomplish this, and it seems to work pretty well. While not noted for gilt-edged accuracy, the Mini-30 is capable of grouping at least as well as any other regular production semi-auto 7.62x39, with the possible exception of the scarce AR-15 clones so chambered.
I wouldn't worry about using mil-spec ammo in a Mini-30. The Ruger engineers (and the lawyers surgically grafted to them) designed it to be a non-issue.
FWIW, virtually all of the 7.62x39 that goes through my Mini is the same mil-spec generic ball that feeds my SKSes. No problems in either.
Ruger, in a bid to expand the handloading options for Mini-30 buyers, designed compromise bore and chamber specs which allowed both mil-spec and 0.308" bullets to be used with safety and at least tolerable accuracy.
IIRC, there is a gradual taper from chamber to bore in the Ruger barrel to accomplish this, and it seems to work pretty well. While not noted for gilt-edged accuracy, the Mini-30 is capable of grouping at least as well as any other regular production semi-auto 7.62x39, with the possible exception of the scarce AR-15 clones so chambered.
I wouldn't worry about using mil-spec ammo in a Mini-30. The Ruger engineers (and the lawyers surgically grafted to them) designed it to be a non-issue.
FWIW, virtually all of the 7.62x39 that goes through my Mini is the same mil-spec generic ball that feeds my SKSes. No problems in either.
telomerase
Member
How are the AR15 clones in 7.62 X 39 bored? .311 or .308?
mainmech48
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While I don't have exact specs available, my supposition is that bore and chamber dimensions will be well within the SAAMI definitions. Both engineering and product liability concerns make it highly unlikely that anyone would market a weapon that wasn't set up to use any ammo meeting SAAMI specs for the caliber. That would be 0.311" nominal.
IMO, any enhanced accuracy in an AR would be more directly attributable to its operating system than its bore and chamber dimensions.
Both the SKS and the AK systems have moving parts with contact points directly attached to the barrel which start moving while the bullet is still in the barrel. This affects the barrel's harmonics in a more-or-less random way which limits the potential for fine accuracy profoundly.
The AR system uses direct inpingement of combustion gasses to the bolt carrier via a fixed tube. The harmonic cycle is therefore relatively stable, and thus much more consistent from shot to shot. This can be demonstrated to some degree by pointing out that AR clones are being built which are capable of 1/2 MOA or less while the best custom AK-based carbines now evident are limited to about 2 1/2 MOA at best.
IIRC, there were not very many 7.62x39 AR carbines and conversion uppers made. Magazines in that caliber are hard to find and quite expensive, as are the several caliber-specific action parts. There just aren't enough real world practical advantages in terms of ballistics or ammo costs/availability to create enough of a market to support mass production.
IMO, any enhanced accuracy in an AR would be more directly attributable to its operating system than its bore and chamber dimensions.
Both the SKS and the AK systems have moving parts with contact points directly attached to the barrel which start moving while the bullet is still in the barrel. This affects the barrel's harmonics in a more-or-less random way which limits the potential for fine accuracy profoundly.
The AR system uses direct inpingement of combustion gasses to the bolt carrier via a fixed tube. The harmonic cycle is therefore relatively stable, and thus much more consistent from shot to shot. This can be demonstrated to some degree by pointing out that AR clones are being built which are capable of 1/2 MOA or less while the best custom AK-based carbines now evident are limited to about 2 1/2 MOA at best.
IIRC, there were not very many 7.62x39 AR carbines and conversion uppers made. Magazines in that caliber are hard to find and quite expensive, as are the several caliber-specific action parts. There just aren't enough real world practical advantages in terms of ballistics or ammo costs/availability to create enough of a market to support mass production.
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