300 Norma Improved. Load testing, info, and builds

[7.62 Gunner]

I get almost zero case growth in this setup. I have a piece of brass with over 30 firings on it and the primer pocket is still tight. The first 5 firings it grew .006. From firings 6-30+ it only grew like .005. Feeds like a dream.

Interesting
I have multiple chamberings with 35 degree shoulders and they all need trimmed 5 firings max, and that's with .002 shoulder bump.