.260 Rem, with a 26" Bartlein data. .090 freebore.
Anything about 45.5gr is heavily compressed, even with a 6" drop tube. I'm using comp seaters, so didn't want to mess with it. I got better accuracy with H4831SC than I did with H4350, and lower ES/SDs. That said, it was 100+ FPS slower at...