My 30-30 load for my Marlin 336a (1976 mfg, 24" bbl) is:
170 grain Speer JFP
32 grains WW748
I don't have a chrono, but supposed to be 2100++ fps.
Shoots 1.25 MOA with prepped, weight-sorted cases.
WW748 was much more accurate than 3031, 4895, or 4064. They ran about 2-3 moa. I have some Leverevolution powder, but have not done much testing with it.
My brother had similar results (500 miles away from me, same rifle and mfg year). He tried 3031, 4895, and 4064 -but with 170 grain JFP Hornady bullets. He got 3 +/- moa groups with them. I told him about my ww748 /170 Speer load, He tried it, and shot 1.5 -1.75 moa. He did not prep (ie flash hole uniforming) or weight-sort his brass. Even so, groups were reduced better than 35% with 32/ww748 and 170 grain Speer JFP bullets.
FWIW.
