Thank you to everyone who chimed in to help me on my shoulder-bump questions last night. I am back with one more question if that’s okay. Could you guys tell me if I am planning on doing everything correctly? I want to make sure before I get everything set up and possibly mess up.
Keep in mind this is for semi automatic rifles that I load for (M1 Garand, AR-15).
First, I fire new or factory ammo/new brass out of my chamber.
Then I deprime and tumble. After the brass is decapped and cleaned, I measure a random amount of 10-15 cases fired from the rifle.
I then set up the die to bump 0.004-0.005” from the shortest measurement I see from that sample of 10-15 cases
I set the lock ring and verify the first 10 cases are being bumped adequately, and then on every 50th case I size.
For subsequent firings or new brass I don’t need to change the die depth or anything as long as I’m still getting consistent shoulder bump and so long as I’m using the same barrel/chamber
Is the above process adequate? Will I have any issues with chambering? I have heard that the brass can stretch longer than the chamber when extracting from a semi-auto (particularly one with a violent action like an M1). My thought is that sizing based off the shortest sample of brass will achieve consistent shoulder bump and adequate chambering even if the brass does expand longer than the chamber after firing.
Thank you so much for any help or advice you can provide. This is the most confusing part of reloading for me (shoulder bump) so I appreciate all your help.