I just tried to load some AccuBond 180s for my 300 win mag using 75 gr RL22. I had trouble seating them deep enough. Could not get the col down to 3.34 and had trouble getting them to chamber in my M77. I'm about out of RL22. Will a different, faster burning power give me more room to use a 180 AB? I had even considered using 200 AB. I'm glad I just bought the 180s.