I used 16" twist, barrels were not so bad getting but it took a little bit of arm twisting. The lightest was 85 grs but I felt it gave to much up so I kind of standardized 95-100
Randy, You correct unless you want to pinch and draw .925s down I was lucky and got sierra to run a bunch. now they are gone and need to go through more work. You are a little light on your velocity for the 7mm..
Ceramic works fine or grind if you have that availability and you don't need to use the crappy free machining steels which are to soft for any real use....