Bulge around the botttom

Johnny Peppers · 11-04-2002, 07:38 PM

RK,
I am assuming that the 225 gr. bullet in the 9mm was a typo, but anyway the shorter case should not make any difference in the case head expansion. I have seen 9mm reloads from SMG brass that would not chamber properly due to an expanded case head, but if your brass is from the same pistol there should be no problem. Are you screwing the sizing die down until it bumps the shellholder in the full up position? It needs to bump fairly hard as most presses have a certain amount of spring that you would not expect.
Are you loading .45ACP or .45 Colt with the 255 gr. bullet? One reloading site has a 260 gr. load for the .45ACP, but it is a revolver load. It uses 5.4 gr. of Unique for 760fps.
Check the spring tension on the firing pin in your 1911A1 by pushing the firing pin in with the slide locked back. I have never heard of this happening, but I suppose the firing pin spring could become weak enough not to put sufficient pressure on the firing pin to retain the firing pin stop plate during recoil.

11-04-2002, 07:38 PM	#3
Johnny Peppers User Join Date: Jun 2002 Location: Calion, Arkansas Posts: 1,042 Thanks: 0 Thanked 1 Time in 1 Post	RK, I am assuming that the 225 gr. bullet in the 9mm was a typo, but anyway the shorter case should not make any difference in the case head expansion. I have seen 9mm reloads from SMG brass that would not chamber properly due to an expanded case head, but if your brass is from the same pistol there should be no problem. Are you screwing the sizing die down until it bumps the shellholder in the full up position? It needs to bump fairly hard as most presses have a certain amount of spring that you would not expect. Are you loading .45ACP or .45 Colt with the 255 gr. bullet? One reloading site has a 260 gr. load for the .45ACP, but it is a revolver load. It uses 5.4 gr. of Unique for 760fps. Check the spring tension on the firing pin in your 1911A1 by pushing the firing pin in with the slide locked back. I have never heard of this happening, but I suppose the firing pin spring could become weak enough not to put sufficient pressure on the firing pin to retain the firing pin stop plate during recoil.