The Firing Line Forums - View Single Post - M1 Carbine (Plainfield) Ammo feed problems

Fallowt · November 4, 2009, 11:48 PM

Well, As I mentioned, the Corbon JHP (and admittingly it has a very-wide front to the bullet, as in "not-pointed") is all I have right now to test with.
There was NO WAY this round was going to chamber because the front of the bullet was just rammed dead about 2mm low of the lip of the barrel. There isn't any machining on the lower barrel breech to help feeding. It's just beveled a bit all around. I've polished a few feed ramps and barrels on other guns to help feeding problems, but we're WAY beyond the few thousandth's of an inch that can be resolved by that with this gun. There is a significant mechanical problem with the feed operation of this rifle, at least with the Corbon ammo in question. It seems to me that (mainly) the feed ramp doesn't go high enough and/or extend far enough forward to meet the lower lip of the barrel, or the barrel is not seated far enough into the receiver.

November 4, 2009, 11:48 PM	#3
Fallowt Junior Member Join Date: October 20, 2009 Location: Miami Posts: 12	Well, As I mentioned, the Corbon JHP (and admittingly it has a very-wide front to the bullet, as in "not-pointed") is all I have right now to test with. There was NO WAY this round was going to chamber because the front of the bullet was just rammed dead about 2mm low of the lip of the barrel. There isn't any machining on the lower barrel breech to help feeding. It's just beveled a bit all around. I've polished a few feed ramps and barrels on other guns to help feeding problems, but we're WAY beyond the few thousandth's of an inch that can be resolved by that with this gun. There is a significant mechanical problem with the feed operation of this rifle, at least with the Corbon ammo in question. It seems to me that (mainly) the feed ramp doesn't go high enough and/or extend far enough forward to meet the lower lip of the barrel, or the barrel is not seated far enough into the receiver. Last edited by Fallowt; November 5, 2009 at 12:15 AM.