Is it normal for a heavy crimp to also reduce the overall length of the cartridge? I have been loading some ammo for my .454 Casull, as well as trying to find the proper crimp needed to keep the bullet from jumping the crimp. I always seat and crimp in two steps. After crimping the round, I find that the overall length has changed anywhere from 0.01 to 0.015. I have been testing the strength of the crimp by marking one round, and leaving it in the cylinder while shooting ten to fifteen shots. I measure the overall length before and after and have found that even with this heavy crimp the bullet will still move about 0.01. This does not extend the bullet enough to bind up the cylinder. I have tested the crimp on some Hornaday factory ammo I have and had the same results. Should I be worried about this, or am I being to picky?