Just loaded up 40 55gr Xtreme bullets with IMR 4064. Heading to the range now to test them at 300 yds. I'll report back when I'm done.
Im interested in the results. I have the same combo. I used 23.1 grains, 24.7 and 25.1. What did you start with? They wern't as accurate as the Horiday 55 grain. Or I was just off that day.