Re: 243 AI fire forming questions
I'm asking "how to fire form brass". I have a custom 243 AI in the works and from all my research, it seems to me that most people who shoot this chambering for competition, fire form by shooting fully loaded 243 rounds. That's how I plan on doing it.
My question is; do I trim cases, and turn the necks on the original 243 load, or wait and do it on the fire formed 243 AI load? Or will it matter.
I'm using Lapua brass. My normal routine for a precision load (and it's worked well) is:
1. FL re-size
2. Expand necks
3. Trim to length and chamfer
4. Turn necks removing only .0005" (SAMMI chamber)
5. Uniform primer pockets
6. De-bur flash holes