Hello I'm new to reloading and I'm having problems getting my OAL to stay at specs. I'm using Hornady dies in a LNL AP. I'm seating the bullet to OAL and backing off to set my crimp. Then run seater down to touch and lock down. Then start my run and my OAL is all over the place over or under by maybe .002-.015. I'm going by the setup instructions with the die. It's not helping my confidence much! Lol. I know it's probably something simple. Any suggestions would be appreciated.