I am looking to load my 357 RSM and 350 Legend subsonic am am wondering if I am better with a plain base 1:25 or a GC'd harder alloy. NOE makes both in the design I am looking at, so it's just a question of obturation I believe so I get no gas cutting. But at 1025fps I need to bump that base up to seal. I am not running the bullets through a can.
Thoughts?