CCI minimags,greentag and standard vel.
I have shot over 8,000 standard velocity RWS,Eley,Fiocchi,Winchester,and CCI .22's in 40 years of competitive shooting with a 1966 High Standard military grip Trophy using 6 different OEM magazines,and have replaced exactly 2 parts(recoil springs) in all that shooting,I was always advised not to use any HV ammo in High Standards,but for plinking with an early Buckmark I use minimags exclusively,over 4,000 so far.