The only data I can find, on a quick search, for 155gr is for the Sierra HPBT. Ive never used that particular bullet, but have used the 156gr PRVI RN, 160gr Sierra RN, and 160gr Hornady RN. I use the abundant data for 160gr bullets from Hornady Sierra and Lyman. My best results have been with slower powders, 4831 and slower.


JTD