I find the best groups in 2 different rifles using RL16 for 129 or 130Gr bullets and Reloader 26 for heavier bullets. But It has been several months since I have been able to find any RL-26 in the states. Powder Valley I guess had some but b4 I could get in an order they were sold out again. You will need to work up loads for your specific rifle as no 2 shoot the same. My success with most of my weapons seems to be about 1/2 to 1 grain under max in Quickload. The only exception is my (2) 257 wby rifles. They like loads right at max.