Re: should I crimp or not
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">Neck tension should be enough to ensure the bullet does not set back into the case.
If the round is in a magazine, any magazine, recoil can cause the cartridge to rebound back and forth in the magazine, so a more significant crimp is called for.
After some years to think about it, I believe that bullets without cannelures don't accept a crimp well. Bullets crimped without canelures that have been pulled and reused without further crimping have clearly demonstrated an accuracy loss in my experience. I believe this indicates that crimping a non-canelured projectile distorts it in some way that degrades accuracy.
Greg </div></div>
Hi Greg,I havn't been on here in a while
Ive been using a lee FCD once in a while and havn't noticed a terrible decrease in accuracy unless I get careless with it and over crimp the bullets(Non cannelure).With magfed 75gr Horn BTHP,and sierra 77gr mag fedammo and a firm neck tension I havn't had any issues with bullet setbackand the only proof I have of that is accuracy on paper.
I have considered crimping for added safety but wonder if it will be that effective considering I havn't had any issues and I don't have any bullets with cannelures. Ive basicly done what you mentioned and resized my expander.
Maybe I'm gambling a bit by not crimping,But with the tighter neck tension,,I havn't had any problems .