Posted: 5/11/2014 8:20:39 PM EDT
After having chambered a round of Federal Champion 230 gr 45 ACP FMJ I noticed that I was getting some setback. This is my first 1911 this year after having an M&P previously. I've never seen these issues with the M&P so I don't know for sure if its the design of 1911s, the fact that its a RIA 1911, or just poor/no crimp on the bullet. On the right is a fresh round out of the box on the left is the round having setback (in case there was doubt).
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More often than not, that is an ammo issue.
Lots of factory ammo has just about zero crimp... Usually just enough to iron out the minor 'belling' that presses put in to allow easier placement / seating of the bullet during assembly... Generally bullets without canelure crimping grooves get no crimp from the factory. 230grn 45acp FMJ ball has no crimping groove.... I tend to run my carry ammo (factory stuff) through a crimp die to increase the crimp a hair. Never had any pressure signs... Never had measurable setback either. |
| Generally we do not fire set-back rounds as a pressure problem could occur. You should try to determine what is causing the ammunition to be jammed into the feed ramp or barrel throat and get it fixed. I like to take a small amount of lubricant and rub it into the feed ramp with my finger - you might try that. Its always good to have some dummy rounds for checking out feeding, loading and extraction. |
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Quoted: More often than not, that is an ammo issue. Lots of factory ammo has just about zero crimp... Usually just enough to iron out the minor 'belling' that presses put in to allow easier placement / seating of the bullet during assembly... Generally bullets without canelure crimping grooves get no crimp from the factory. 230grn 45acp FMJ ball has no crimping groove.... I tend to run my carry ammo (factory stuff) through a crimp die to increase the crimp a hair. Never had any pressure signs... Never had measurable setback either. That is some interesting info. I crimp my 200 LSWCs to .468 which is several thousandths more than the manuals specify. The bullets don't move, the gun goes into battery better, and I've never had any pressure problems. I got that dimension from Patrick Sweeny's 1911 book. Been working perfectly for years and 1000's of reloads. |
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Quoted:
More often than not, that is an ammo issue. Lots of factory ammo has just about zero crimp... Usually just enough to iron out the minor 'belling' that presses put in to allow easier placement / seating of the bullet during assembly... Generally bullets without canelure crimping grooves get no crimp from the factory. 230grn 45acp FMJ ball has no crimping groove.... I tend to run my carry ammo (factory stuff) through a crimp die to increase the crimp a hair. Never had any pressure signs... Never had measurable setback either. From my experience it is usually a pistol issue. The crimp for 45 ACP is only to remove the bell in the case. Over crimping will not hold the bullet any tighter unless you deform the bullet. I would bet the OP's gun has a pause as it chambers the round and has two distinct noises as the round is chambered. One as the round hits the feed ramp or barrel and one when it fully chambers. The slide slows as the round binds. On a well fit pistol, the slide has no noticeable pause as it picks up the round and chambers it. If the issue is the pistol, mags like Wilsons can band aid it. If they help, take the pistol to someone that can fix it right. |
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Quoted:
From my experience it is usually a pistol issue. The crimp for 45 ACP is only to remove the bell in the case. Over crimping will not hold the bullet any tighter unless you deform the bullet. I would bet the OP's gun has a pause as it chambers the round and has two distinct noises as the round is chambered. One as the round hits the feed ramp or barrel and one when it fully chambers. The slide slows as the round binds. On a well fit pistol, the slide has no noticeable pause as it picks up the round and chambers it. If the issue is the pistol, mags like Wilsons can band aid it. If they help, take the pistol to someone that can fix it right. Quoted:
Quoted:
More often than not, that is an ammo issue. Lots of factory ammo has just about zero crimp... Usually just enough to iron out the minor 'belling' that presses put in to allow easier placement / seating of the bullet during assembly... Generally bullets without canelure crimping grooves get no crimp from the factory. 230grn 45acp FMJ ball has no crimping groove.... I tend to run my carry ammo (factory stuff) through a crimp die to increase the crimp a hair. Never had any pressure signs... Never had measurable setback either. From my experience it is usually a pistol issue. The crimp for 45 ACP is only to remove the bell in the case. Over crimping will not hold the bullet any tighter unless you deform the bullet. I would bet the OP's gun has a pause as it chambers the round and has two distinct noises as the round is chambered. One as the round hits the feed ramp or barrel and one when it fully chambers. The slide slows as the round binds. On a well fit pistol, the slide has no noticeable pause as it picks up the round and chambers it. If the issue is the pistol, mags like Wilsons can band aid it. If they help, take the pistol to someone that can fix it right. THIS... 
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