Get one box of everything of worth , test them and buy plenty . I tend to shoot more HV than subs , though i will often use super low power .22rf , subs etc . Don't cheap out . Don't worry about HV having a bit of a crack its does not put the rabbits off that much at all with a moderator and dead bunnies never hear anything
Personally speaking SK , Lapua , CCi Velocitors in the HV . Lapua subs are the most accurate .22 rf ammo i have shot ( once put 9 in the same hole at 100 yards ) would have been ten but i thought something was wrong and only one bullet hole appeared on the paper , Put one in the sand as i thought there was something amiss , still wonder if i made that last shot ? Really was one exact hole but only a 9 shot one . Strangely it was at a club and the batch the RFD had was gone the first day the shop re-opened !
You get another 30 yards Trajectory path with most HV over subs and it seems to not really bother other rabbits very much at all , even with my really old parker hale mod