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Originally Posted by abyssdncr
Newbie,
I'm afraid I had a similar experience when I first started. My problem was that I had the bullet seating die screwed in to far. So as I finished the seating stroke the crimping portion of the die engaged too soon. This crimped the bullet firmly to the brass and subsequently collapsed my shoulders. Try unscrewing the seating die two turns and seating with no crimp. I'm loading with no crimp on my AR and do not observe the bullets being seated deeper when loaded from the mag, nor unseating the bullets in the mag when firing. This is with hot supersonic 125 loads. Lighter loads and subsonic loads should be fine with no crimp as well. Give that a try and I suspect your collapsed shoulders will be a thing of the past.
Good luck,
8)
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Abyssdncr,
I think your correct. I agree that Joe's problem is probably caused by over-crimping and then trying to force the crimped bullet further into the case causing the shoulder to buckle. Funny thing is my redding 2-die set doesn't seem to crimp at all. I have the die set all the way to the shellholder and I seat the bullet out as far as it will allow me and still fit in the magazine and i see no crimp. I did trim my case necks pretty short so I may have to reset the dies when my cases stretch some more. However he mentioned the same problem even with virgin formed 221 brass. I was trimming about 1-1.5mm after forming my virgin brass, have my seating die screwed in all the way, and I see no signs of crimp. I'll check my COAL when I get home and see how it compares to everyone elses.
FYI: This question was actually posted by Joe Matza before the crash I just moved it over to the new forums ;)
--Chris
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