To continue the hijack, .22RF's prefer the ammo that shoots well in them.
My East German Haenal is very good copy of an Anschutz. After shooting ALOT of different brands through it including 10x. The best accuracy was with a very old lot of Lapua that I found in a gunshop. I have one box left from that brick for 'special occassions'. Second best in this rifle is Russian Junior Brass. I haven't seen it in over a decade and it was apparently only available for a few months. I bought an entire case of the lot # it preferrs.

I have 2500 rounds left.

With the Lapua I have a couple of targets (5 shots) that went just over 1/2" at 100 yards on a perfectly calm cool morning at Ben Avery. The Junior B will shoot at 1" on a calm day but won't match the Lapua.