Speaking to .22LR, I buy what I can find. I am NOT a competition shooter. If it is close, it works. I use the .22 more for practice that arthritis forbids me to use .45 for.
CCI is always best.
Rem Thunderbolt does lead up the barrel, but if you are big on cleaning after every range trip (as I am) 100 or so won't be a horrible issue if the price was right (less than 4c per round would be my target for TB).
Rem Golden Bullet has a fair rate of trashed rounds, but again, at 5c or less per round, I can't argue.
I found CCI MM this weekend. 300 Rounds for $30 (add tax as well), and then today 200 rounds of CCI SV for $19 (add tax). At those prices, if there is a FTF round, I call CCI to raise cain.
Lately Federal Lightning and Auto Match, as well as American Eagle, have been junk. I suspect a manufacturing change (for the worse).