I've done a quick load development for both the 7mm rem mag barrel and 223 barrel.
The 7mm rem mag load is 162 amax seated 50 thou off the lands, 71gr 2217, winchester brass and federal 215 primer, average velocity is 2854. I could shove a bit more powder in, but it is shooting well enough for me.
I cleaned the barrel of all the copper, put an oiled patch through, then a dry patch. Shot 1 and 2 were high, with shot 3 landing where I had it two days ago. I adjusted the scope 2 clicks down and 1 click right, then shot the 3 shot group. Could go 1 click more to the right.
The 223 load is 50gr TTSX seated 50 thou off the lands, 26.5gr H335, Hornady brass, federal 205 primer, avg velocity 3266fps.
I did the same as the rem mag barrel, clean copper, oil, dry patch. Shots 1 and 2 were out a bit, shot 3 was where I had it two days previously. I then fired another 3 shots without adjusting the scope.
Off hunting next weekend.
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