Magnum Wheel Man
New member
even better if it takes GI magazines ???
The .30 carb case is supposed to headspace on the cartridge mouth, and it does, but if you make the cartridge a bit too short, it will still work properly. This is because the carbine uses a "controlled feed." That is, the cartridge being stripped out of the magazine slides up the breechface and under the extractor claw long before it ever fully chambers. If the cartridge is too short, it will actually "headspace" on the extractor claw! The extractor will hold it in its proper position as you prepare to fire it.
If you have a tight chamber then case length become and issue.
In a revolver you have no “wiggle” room so headspace – case length is best a little short.