I finally got my 264 and managed to get out for a bit on Saturday to break it in and shoot some of the RL33 loads. The rifle is a Model 70 26" Sporter. Very thin barrel, I'm figuring about a #2 size. Heats up fairly quickly.
Loads started at 69 grains up to 74. First decent group came at 70 grains with a 3-shot group of .75". Chrono'd a couple of rounds and was rather disappointed at the 2875 fps. 71 grains opened up to a 1.5 inch group with each shot running about .5 inch from the previous shot at the 1 o'clock location. Had to stop there as had things on the schedule. I hope to get out and shoot the rest of the loads sometime this week but, not holding my breath looking at my schedule.
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Stupidity is the deliberate cultivation of ignorance