I have been shooting the 55gr Nosler lead free in my 6mmBRNorma. The rifle is a Blaser R8. Bbl 22.5". 1/8" twist. Accuracy at 100yds is in the 1/2" range for 5 shot groups. I am using 35.1/AA2230. COAL is 2.265" (.010" jump). Velocity is 3811fps, ES32fps/10shots