I was testing some rounds in my M1A to see if the OAL was changing while in the magazine while being fire. Placed 10 rounds in the gun, fired 9 and checked the OAL of the 10th. Length changed between .005 and .008 each time. Did the same thing but this time checking the 10th round after the 8th was fire, therefore exposing the 10th round to the inertial forces while in the mag but never being chambered. There was no measurable change in the OAL.
So clearing the OAL is changing do to clambering. I had two batches of ammo that I loaded up, one no crimp and another with a light crimp. So is it safe to assume that I should keep crimping a dummy round until there is no OAL change?
So clearing the OAL is changing do to clambering. I had two batches of ammo that I loaded up, one no crimp and another with a light crimp. So is it safe to assume that I should keep crimping a dummy round until there is no OAL change?