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The 22BR with JLK 90gr bullets is great fun, for a while. Less recoil, obviously, than even the 6BR with 107's: the rifle (prone stock shot F-class) barely twitched back, and the cross hairs stayed in the black of the LR target. Shot a clean Palma (LR) at Raton with it, and found that wind doping was about equal to the 6BR with 107's.
Seem to recall that H4350 worked pretty well. Varget too fast, double-based powders impressive to the chronograph but not to the calipers: 2900 to 2950fps seemed to group best. Without digging out my loading log, seem to recall H414 generating some astonishing velocities: 3200+, but leaving the bore almost too dirty to see through.
However: trouble in Paradise. At 800-odd rounds, the barrel gave up in a spectacular way. From shooting Xs only at 800 yds during a pre-match sight-in, to the next day's debacle: unable to hold the black at 800yds.
If you do your own barrel work and want a giggle: try the 22BR. If not, go to bigger bores!