are you supposed to do a ladder or something to find your most accurate charge of the powder you want to use? before doing the OAL test?Start with the Berger seating depth test to find your best OAL. Then, load 140 class bullets with enough Retumbo to reach 3150ish from a 26" barrel. You will find your sweet spot there.
Do the OAL test first, with a starting load. Then do your powder charge workup. My OAL came in at 3.330 (about .040 off the rifling) in a Model 70 Sporter. It mag feeds nicely.are you supposed to do a ladder or something to find your most accurate charge of the powder you want to use? before doing the OAL test?
I don't think your load is out of line at all. When I did my load workup with RL-33 in my Model 70, I encountered ejector marks just below 79 grains. I consider 78.0 grains to be max, but didn't get anywhere near the velocity you did. Unfortunately, I didn't get any accuracy out of RL-33. Even if the accuracy were there, it didn't show enough advantage over Retumbo to be worthwhile. I strongly suspect it would work better with heavier bullets.Na, I don't think so. Bolt lift is easy and the primer pockets are tight. Primers are not cratered or pierced. Several shooters over on the 24 hour Campfire are using up to 77 grains and not having any problems either. I fired these rounds last August in 87 degree weather. I worked up starting at 71 grains and went up to 76. I believe that the RL-33 with it's retardant is going to breed new life into this old cartridge.
Try it yourself, you may well be surprised.
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