Thread: Case head separation

Well "partial" doesn't accurately describe the approach. It would be better to say correct or appropriate headspacing.

The method doesn't necessarily require shoulder gauges. Start by dismantling or at least fully unwinding the spring tension in the bolt. Starting with too little sizing on a case that is slightly tight after firing, slowly wind the die in until the bolt will close with basically no resistance on bolt closing. This will get a more correct amount of resizing. Eric Cortina has a video on it from memory.