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Rifles, Reloading, Optics, Equipment
Reloading
Crimp .223?
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<blockquote data-quote="Kevin Thomas" data-source="post: 444490" data-attributes="member: 15748"><p>Hi Mike,</p><p> </p><p>BigSkyGP already nailed a bunch of this stuff, but I'll toss in two cents worth as well. First, you really don't need to crimp when loading for an AR, you can control neck tension just fine via the case and sizing alone. In this case, however, the mixed brass sounds to be the culprit for you, and yes, the no-crimp approach requires the use of good, consistent (and same make) brass. It needs to be loaded in lots, and those lots segregated and loaded together. Crimping may solve the problem for you here, but understand the <u>real</u> problem lies elsewhere.</p><p> </p><p>Case length may, or may not affect crimp, but proper trimming is always a good thing with an AR. Type of crimp is what makes the difference. Redding and several others make a taper crimp for the 223. These rely on the cases being near identical in length to deliver the same tension once crimped. On the other hand, there's also the Lee Factory Crimp die, and this would negate or at least minimize the problem of varying case lengths It's a good crimp, and if I HAD to use a crimp, that's probably what I'd go to first. Lastly, don't over-do it. Whatever crimp you need, use the minimum to get the job done and that should minimize the negative impact on accuracy that crimping sometimes displays.</p><p> </p><p>Small base sizing may or may not be required, but FL sizing ALWAYS is with an AR (or any other semi-auto). Yo want free and easy chambering, and a shoulder that's bumper .003" - .005" with a gas gun, not the .001" - .002" that works in a bolt rifle. Different animals entirely, and they need to be treated as such. The AR's are a great series of rifles, and they'll shoot far better than most give them credit for. Virtually all the old records once held with the M14s have long since fallen to the ARs that dominate Camp Perry today, so that should say something for them. Give 'em a chance, and you'll like what you find.</p><p> </p><p>Kevin Thomas</p><p>Lapua USA</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 444490, member: 15748"] Hi Mike, BigSkyGP already nailed a bunch of this stuff, but I'll toss in two cents worth as well. First, you really don't need to crimp when loading for an AR, you can control neck tension just fine via the case and sizing alone. In this case, however, the mixed brass sounds to be the culprit for you, and yes, the no-crimp approach requires the use of good, consistent (and same make) brass. It needs to be loaded in lots, and those lots segregated and loaded together. Crimping may solve the problem for you here, but understand the [U]real[/U] problem lies elsewhere. Case length may, or may not affect crimp, but proper trimming is always a good thing with an AR. Type of crimp is what makes the difference. Redding and several others make a taper crimp for the 223. These rely on the cases being near identical in length to deliver the same tension once crimped. On the other hand, there's also the Lee Factory Crimp die, and this would negate or at least minimize the problem of varying case lengths It's a good crimp, and if I HAD to use a crimp, that's probably what I'd go to first. Lastly, don't over-do it. Whatever crimp you need, use the minimum to get the job done and that should minimize the negative impact on accuracy that crimping sometimes displays. Small base sizing may or may not be required, but FL sizing ALWAYS is with an AR (or any other semi-auto). Yo want free and easy chambering, and a shoulder that's bumper .003" - .005" with a gas gun, not the .001" - .002" that works in a bolt rifle. Different animals entirely, and they need to be treated as such. The AR's are a great series of rifles, and they'll shoot far better than most give them credit for. Virtually all the old records once held with the M14s have long since fallen to the ARs that dominate Camp Perry today, so that should say something for them. Give 'em a chance, and you'll like what you find. Kevin Thomas Lapua USA [/QUOTE]
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Crimp .223?
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