The years pass and with any luck inquiring minds will learn something along the way. I have been blessed in that regard and my rimfires shoot well. The only gun I have that prefers HV ammo is an ancient 10/22 which prefers WW Powder Point ammo. I will not bother posting pics, but the Ruger shoots 5 shots into a ragged hole at 50 yards, and a wee bit under 1/2 MOA at 100 yards. It does nearly as well with a variety of Euro production SV ammo.
My .22 LR bolt guns dote on Wolf MT/SK Standard+, as does my Contender Carbine which recently put 5 rounds into a .091" group at 50 yards.
I have another TC Carbine chambered in .22 Short which will put 5 CB Shorts in one ragged hole at 25 yards. Hogs hate that gun.
Lastly, I undertook an experiment awhile back wherein I purchased some LR brass configured for CF priming, and it too will make wee little groups, some running ~1/2" at 50 yds. So, it comes to pass that my .22's are boring.
One of the curious things discovered with the .22 CF project during ammo breakdown relates to the quality of priming in factory RF ammo. For the most part, American production ammo is pure junk insofar as QC is concerned. Yes, they fire, but the curiosity is the degree of which priming compound is smear inside the case walls, sometimes all the way up to the bullet base. Conversely, the Euro production samples that I disassembled looks like the priming is surgically implanted. It explains, at least to me, why American production ammo tends to have larger extreme spreads of velocity than Euro ammo...every time.