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Posted: 1/2/2013 7:23:35 PM EDT
| i bought some military brass for reloading 308 and im having trouble getting them to prime. are there any special steps i must take to get the primer pockets to the rite size? |
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I am not an expert and am only repeating what I have learned on these pages.
That said mil brass (think Lake City, etc) is thicker and thus has less case volume than commercial (think Winchester, etc) cases. I cannot say it's 10 percent less but several folks around here have advocated 10% less before so it must be a general rule of thumb. When you think of it a less case volume it all makes sense. But as advocated, start low and work up anyway. It's not worth hurting a gun and you get to shoot more while working up the loads. Win - Win. ETA. In my Sierra 5th edition it not only tells what case they used, but for .308 it says to reduce the charge one to two grains for military brass due to thicker construction thus reduced case capacity. |
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Quoted: Dry.... I hadn't come across the 10% reduction before for mil brass. I haven't been using mil brass as yet, so it hasn't been an issue. Is this also something that is common knowledge? Published in the usual reloading manuals? Thanks, -ppknut Speer 12, p 270 5% Lyman 49, p 219, 1 to 2 grains less the shown in data Speer 14, p 451, 3% I always reduced 10% and worked up.
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Quoted: dam it more and more shit everytime i turn my head i have to buy. next time i order ill get the rcbs swaging die. i had some 9mm that only about 75% of them would prime. after doing some research about the crimping turns out it was all crimped Another method,  Hornady primer crimp reamer chucked in a drill. Has a positive stop so you can't ream too deep. |
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Quoted:
I'm still searching for a reference that discusses reducing loads in military brass. Can someone enlighten me a little more on this subject? Thanks The most important thing to remember about military brass is that the internal capacity will probably be less than commercial .308 Win brass, because military brass often has thicker webs or casewalls. Montana Marine reports his fire-formed milsurp cases hold 56 grains of H20 on average compared to 58 grains for fire-formed Winchester. Given the reduced capacity of military brass, you should reduce posted max loads by 1.5 grains when loading with Lake City or most other milsurp brass. However, the IMI MATCH brass is closer to commercial brass in internal case capacity (ICC). Source:
http://www.6mmbr.com/308Win.html |
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Quoted:
Quoted:
dam it more and more shit everytime i turn my head i have to buy. next time i order ill get the rcbs swaging die. i had some 9mm that only about 75% of them would prime. after doing some research about the crimping turns out it was all crimped Another method, Hornady primer crimp reamer chucked in a drill. Has a positive stop so you can't ream too deep. thanks, that look like it would be faster/easier have you tried both? is it? |
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