I have always used berger hybrids and jumped them .020 ish. However, recently Mark Gordon (SAC) mentioned some whizz bang device of his was showing that .055-.075 was the best. I decided to test it out and while the accuracy was not any better than .020, both were averaging under .375” for 4 five shot groups, the SD’s were almost half of the .020 loads. I’ll be jumping the .065 for this barrel.