I had a load for my Valkyrie that I knew was flirting with too hot, even though it was under the published 'Maximum Load' because I would get an occasional swipe on the cartridge base. Well yesterday I had a primer blowout so I shut down, went home and pulled the bullet's from the remainder of that series of ammo. I plan on re-using the bullets but the crimp, what I thought was a very mild crimp, has deformed them slightly. These would be a second tier ammo because of this but I hate to throw them out. Is there something I am missing or should I just throw them out. Maybe that crimp is what put them over the top.
Polymer tips are slightly deformed on some of them, I use an inertia hammer.
I found that reusing crimped PlATED bullets caused problems in 9mm 1911. Without changing crimp settings, head was now smaller. When slide cycled during repeat firing, head came loose into Barrell. Not a real squib but close enough.
I've used lots of pulled bullets that I've loaded but most I bought them for cheap, never used any with a crimp that deep. I'd go ahead and use them and I wouldn't give up on that load yet! Just use a much lighter crimp, also be careful reusing these as that groove is where the new light crimp will be and the recoil of the first round may cause the other to slip in the case!
I've only crimped for the .30-30 (tubular mag), .44 mag., and .357 mag. All bullets had a cannelure or crimping groove.
When shooting a bolt rifle competitively I never crimped. I never felt the need as the rifle will shoot a 3/8" group at 100 yds. if I do my part...
Loaded up five rounds using everything the same, except no crimp. What a difference, the primers are still rounded around the shoulders and the pin dent is what I would call normal. I even think I could up the load another .5 gr. with no pressure problem, but that experiment is for another day. For now, no more crimping. Thanks fellows