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Posted: 12/9/2010 4:49:31 PM EDT
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1.) My 1911 has a match barel. Are match barel chambers tighter than non-match barel chambers?
2.) I just loaded up about 700 rounds of .45 using 230grn LRN with a COL of 1.20". Of those 700, 7-10 won't chamber or chamber really tightly. Upon inspection, I noticed that all of them were PMC brass. Does anybody have similar trouble with PMC brass? I have similar trouble with all my rounds if I don't use a pretty heavy crimp, which is why I wonder if my 1911 has a tight chamber. I don't have another .45 to compare it to. |
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Quoted:
1.) My 1911 has a match barel. Are match barel chambers tighter than non-match barel chambers? 2.) I just loaded up about 700 rounds of .45 using 230grn LRN with a COL of 1.20". Of those 700, 7-10 won't chamber or chamber really tightly. Upon inspection, I noticed that all of them were PMC brass. Does anybody have similar trouble with PMC brass? I have similar trouble with all my rounds if I don't use a pretty heavy crimp, which is why I wonder if my 1911 has a tight chamber. I don't have another .45 to compare it to. First place to look - If you put your calipers on the crimp (top of the brass) it should say .472 - .473"". If it's larger set your crimp die down. |
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match barrels may be a wee bit tighter than a standard barrel. maybe one or two thousandths narrower. still within SAAMI specs, obviously. there are a number of ways to handle this:
1. use a micrometer to measure the loaded round OAL, case width, and crimp; and compare the measurements to a factory round that you know will chamber properly. you shouldnt have to use a heavy crimp; a taper crimp of .002 should be enough. 2. get a case gauge and make sure the round will completely fit within the gauge here's what i do: after sizing and re-priming, i measure the empty case and compare it to SAAMI measurements, especially the case mouth. then after belling, charging, and bullet seating, i slowly tighten the crimp die until the case walls are back to where they were in the first step, then .002 more...that usually gets me right to where the factory loads are crimped. good luck! |
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Solutions.
1. Ream chamber. (not an option I would choose) 2. Buy and use Lee FCD. That said. There are a few nay sayers against fcd and their claims are unwarranted. If factory ammunition is "factory crimped" and is accurate. Why can't you produce an accurate round using same method ? Answer is you can. Is bullet swaged in case ? It certainly is. Will unsorted brass produce inconsistent grouping ? Yes, that's why your brass should be kept sorted if sub groups are important. How can I, 1911smith prove this ??It's all good and in the works. The Mizzoura Boyz had us a shoot out a few weeks back. Data compiled from event was much, much more than I dreamed of seeing. Will be posting information taken from event for months. Some of the ammunition we tested was factory. Factory ammunition used for a set-back fact quest. I'll be dissecting brand of ammunition used. Bottom line. I suggest you need an FCD. |
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Quoted:
Solutions. 1. Ream chamber. (not an option I would choose) 2. Buy and use Lee FCD. That said. There are a few nay sayers against fcd and their claims are unwarranted. If factory ammunition is "factory crimped" and is accurate. Why can't you produce an accurate round using same method ? Answer is you can. Is bullet swaged in case ? It certainly is. Will unsorted brass produce inconsistent grouping ? Yes, that's why your brass should be kept sorted if sub groups are important. How can I, 1911smith prove this ??It's all good and in the works. The Mizzoura Boyz had us a shoot out a few weeks back. Data compiled from event was much, much more than I dreamed of seeing. Will be posting information taken from event for months. Some of the ammunition we tested was factory. Factory ammunition used for a set-back fact quest. I'll be dissecting brand of ammunition used. Bottom line. I suggest you need an FCD. Went to order one the other day, but midway was out and I haven't checked back. For the ones that won't chamber, the problem seems to be a slight bulge at the base of the bullet, not at the case mouth. I assume it's because the bullet isn't getting seated exactly straight, but I'm not sure how to fix that. Also, I wonder why it seems to be much worse on the PMC brass? |
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Probably (guessing here) the PMC brass is a bit thicker than the other brass you are using. The Factory crimp die will take care of that "bulge" at the base of the bullet.
I get the same thing when loading my swaged bullets. They are thicker at the base but the factory crimp die takes care of it. |
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I had the same problem recently when loading a batch of 500, 230gr cast RN and WCC brass.
8 or 10 would not gauge in a Dillon 45 ACP case gauge. If a round gauges, it will chamber in my Kimber Stainless Match 2. After much bullet pulling, resizing, recrimping still not gauging. These were loaded on a SDB, and I even tried a Lee FCD, no go. Then I measured the case length. AH Haw, cases were over max length. 
Trimmed them, debured, loaded, and they all gauged. First time I ever trimmed 45 ACP brass, so check case length. 
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Quoted:
I had the same problem recently when loading a batch of 500, 230gr cast RN and WCC brass. 8 or 10 would not gauge in a Dillon 45 ACP case gauge. If a round gauges, it will chamber in my Kimber Stainless Match 2. After much bullet pulling, resizing, recrimping still not gauging. These were loaded on a SDB, and I even tried a Lee FCD, no go. Then I measured the case length. AH Haw, cases were over max length.
Trimmed them, debured, loaded, and they all gauged. First time I ever trimmed 45 ACP brass, so check case length. http://i250.photobucket.com/albums/gg272/dryflash3/Shooters/P2030042.jpg This crossed my mind, but since it was all one type a brass, I didn't bother measuring. Most of my .45 brass is purchased once-fired, or range pick up so I have no idea what it was fired out of. I do need to get the LFCD as well as the Dillon case gauges. Do Dillon case gauges indicate when the case is to long, or is it just a chamber gage? |
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Quoted:
1.) My 1911 has a match barel. Are match barel chambers tighter than non-match barel chambers? 2.) I just loaded up about 700 rounds of .45 using 230grn LRN with a COL of 1.20". Of those 700, 7-10 won't chamber or chamber really tightly. Upon inspection, I noticed that all of them were PMC brass. Does anybody have similar trouble with PMC brass? I have similar trouble with all my rounds if I don't use a pretty heavy crimp, which is why I wonder if my 1911 has a tight chamber. I don't have another .45 to compare it to. 1) Usually 2) My 1911 will not chambered cartridges loaded with .452" diameter cast bullets, unless I run them through a Lee FCD. The FCD swages the bullets down to .451 and then they chamber easily. If you'd rather run them at .452" size, you might want to look at getting a smith to ream your chamber. |
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Quoted:
Quoted:
1.) My 1911 has a match barel. Are match barel chambers tighter than non-match barel chambers? 2.) I just loaded up about 700 rounds of .45 using 230grn LRN with a COL of 1.20". Of those 700, 7-10 won't chamber or chamber really tightly. Upon inspection, I noticed that all of them were PMC brass. Does anybody have similar trouble with PMC brass? I have similar trouble with all my rounds if I don't use a pretty heavy crimp, which is why I wonder if my 1911 has a tight chamber. I don't have another .45 to compare it to. 1) Usually 2) My 1911 will not chambered cartridges loaded with .452" diameter cast bullets, unless I run them through a Lee FCD. The FCD swages the bullets down to .451 and then they chamber easily. If you'd rather run them at .452" size, you might want to look at getting a smith to ream your chamber. This makes sense. With a heavy crimp from Hornady seating die, I can get most to chamber just fine. The PMC brass must just be a bit thicker. Looks like I will be investing in some crimp dies for the .45 and the 9mm as well as some powder through expanders. Can't do without the powder cop. Can anybody recommend a good powder through expander(s)? I know I saw a thread a while back, so I guess I could actually do a search. 
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Quoted:
Quoted:
I had the same problem recently when loading a batch of 500, 230gr cast RN and WCC brass. 8 or 10 would not gauge in a Dillon 45 ACP case gauge. If a round gauges, it will chamber in my Kimber Stainless Match 2. After much bullet pulling, resizing, recrimping still not gauging. These were loaded on a SDB, and I even tried a Lee FCD, no go. Then I measured the case length. AH Haw, cases were over max length.
Trimmed them, debured, loaded, and they all gauged. First time I ever trimmed 45 ACP brass, so check case length. http://i250.photobucket.com/albums/gg272/dryflash3/Shooters/P2030042.jpg This crossed my mind, but since it was all one type a brass, I didn't bother measuring. Most of my .45 brass is purchased once-fired, or range pick up so I have no idea what it was fired out of. I do need to get the LFCD as well as the Dillon case gauges. Do Dillon case gauges indicate when the case is to long, or is it just a chamber gage? Pistol is a chamber gauge, rifle will tell you if case is too long. |
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