I have had good results with CCI Sub-Sonic HP, I found them more accurate than the Remington version I used to use. More energy than CCI Quiet rounds, but without the sonic Crack of high velocity shells. WK
My go-to .22LR ammo as well. I had a questionable grouse kill a few years back using CCI SV, hit it in the head but not the brain, and while I did eventually retrieve the bird, upon further inspection I concluded that a HP bullet would have killed it instantly. Unfortunately the RN bullet zipped right through and meant that little bird suffered a bit unnecessarily. Since then I've only shot RN at paper.
Not trying to stir the pot, millions upon millions of animals have fallen to the mighty .22LR RN! I'll be using HP's from now on....just like I'll be using "tough" bullets like Partitions, TTSX's, A-Frames, etc. on big game and never again a "rapid expansion" type bullet. It's all personal preference and shot placement!