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Post by 500fksjr on Jun 21, 2014 18:07:26 GMT -5
I would like to know what most of you use on heavy 45 LC example 350 grn.@ 1250fps do you use a roll crip or a taper crimp? Thanks for the imput
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Post by zeus on Jun 21, 2014 18:20:15 GMT -5
Minimal belling of the case and keep moving the standard roll crimp seater die down until I have a nice flat crimp where I want it. I use that on all my heavy recoilers.
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Post by seancass on Jun 21, 2014 19:21:40 GMT -5
I don't have the scientific method of Zeus. Lee Factory Crimp Die. nice, full crimp. Never had any problems to report.
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Paden
.375 Atomic
Lower Goldstream Creek
Posts: 1,132
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Post by Paden on Jun 22, 2014 2:18:48 GMT -5
I would like to know what most of you use on heavy 45 LC example 350 grn.@ 1250fps do you use a roll crip or a taper crimp? Thanks for the imput For my heavy .45 loads I use a Redding Profile Crimp. You couldn't convince me to trade it for any other; I'm firmly convinced it's the best crimp die known to man. Inexplicably, Redding flat refuses to make one for .500 Linebaugh.
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Post by Ken O'Neill on Jun 22, 2014 5:19:44 GMT -5
Roll crimp.
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Post by sheriff on Jun 22, 2014 9:49:41 GMT -5
Roll crimp o n th .45 Colt, tapered on the .45acp.
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Post by nolongcolt on Jun 22, 2014 14:42:40 GMT -5
Roll crimp.
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Post by tek4260 on Jun 22, 2014 14:46:33 GMT -5
Max case neck tension, mild taper crimp, and a bullet that is larger than the throats to arrest any creep under recoil. The only downside I suppose is that I have to seat my loaded rounds in the cylinder with my thumb rather than them just dropping in. But, I have been lucky in that I have never had one that I couldn't seat once I got my dies set.
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Post by 500fksjr on Jun 22, 2014 15:49:30 GMT -5
Thanks for the imput...I have never had an issue before now with 45LC. I have bought some 350 swc-k-pb and was trying to run them at 1200 fps and have had major bullet jump...my 500L never and my normal load of 12.0 hs6 270grn 45 never.
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Post by zeus on Jun 22, 2014 17:53:25 GMT -5
There are times that I use one size up expanding die so that it expands quicker on the end of the brass and allows max neck tension. On 45-70, I sometimes use 475 Linebaugh etc. It may help with a little more tension in your case.
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Post by Ken O'Neill on Jun 22, 2014 19:56:04 GMT -5
Thanks for the imput...I have never had an issue before now with 45LC. I have bought some 350 swc-k-pb and was trying to run them at 1200 fps and have had major bullet jump...my 500L never and my normal load of 12.0 hs6 270grn 45 never. With a bullet and powder charge that heavy in .45 Colt you can expect to see bullet jump or creep unless you use a heavy roll crimp. As cases are repeatedly reloaded, the brass will lose its ability to hold that bullet otherwise.
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Post by 2 Dogs on Jun 23, 2014 9:37:22 GMT -5
Roll crimp on all bullets that have a crimp groove. I use enough to prevent bullet jump.
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Snyd
.375 Atomic
The Last Frontier
Posts: 2,388
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Post by Snyd on Jun 25, 2014 1:24:40 GMT -5
Lee Factory crimp die with a 355gr wfn at 1200 in 7.5 45 Colt. No probs. Same boolit in 454 brass at 1300 in 4" Redhawk. No probs. I have a Redding Profile crimp die as well but with this particular boolit and it's wfn profile it doesn't work.
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Post by subsonic on Jun 25, 2014 8:49:24 GMT -5
Crimp only provides 10% (at most) of the holding power required to prevent bullet pull from recoil and to have good ignition. Case neck tension is the other 90% and comes from having the right cases, boolit size, expander and sizer combo for what you are trying to accomplish. Roll crimps are really to prevent bullet setback in magazines. Taper crimps are to remove the bell-mouth on an expanded case. Over-doing either will destroy case neck tension and ruin accuracy. Can even make bullets perform poorly on impact by breaking in hal where they were crimped or shedding their jackets. Don't beleive me? Seat identical bullets in 5 cases prepared as follows: Sized, belled & expanded, NOT CRIMPED. Sized (not expanded or crimped) but slightly round out the case mouth with something to create a bell-mouth. Sized, expanded, crimped properly. Sized, expanded, over-crimped. UNSIZED, but crimped however you want. Run these up in your press with no die installed and clamp vice grips on the bullet nose. Pull the handle and pay attention to which one takes more effort to remove. These are some 10mm that were loaded by a buddy that I pulled with the method above.
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Post by youngdave on Jun 27, 2014 14:44:29 GMT -5
I started sizing my Colt brass with a Dillon .45 ACP sizing die. I'm not real sure, but it seems I read .45 ACP sizing dies will size your brass .001 to .002 smaller than Colt sizing dies. It doesn't seem like much, but it sure seemed to increase the tension on the bullet. I could actually see the bullet in the case, again. Of course, my Colt carbide sizing die had sized over 5000 rounds. Is it worn out?
I had some Colt cases that have loaded too many times by most hand loader's standards. I rarely load my .45 Colt over 1000 fps in all my bullet weights from 200 to 315 grains. I resized them in the ACP sizing die, and I actually had to trim the .45 Colt cases, first time ever. To me, that points to brass being moved forward from sizing smaller.
What do you think?
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