Fireforming. You only get one chance to make good brass.

Improved Rifle Cases Benefit the Serious Handloader: The His - RifleShooter

My Savage 24F 22 Hornet chamber AOL seems pretty long

Fire forming - Wikipedia

25-35 AI Loads Shooters Forum

Improving the 375 H&H, Page 10

Case Head Separation - Page 2 - Alberta Outdoorsmen Forum

5 Ways To Ruin A Good Handload An Official Journal Of The NRA

Good or bad, improved chambers, and fire forming

Brass forming/annealing question

Fireforming Rifle Brass: You only get one chance to make good brass. ctdshooting