Cheap & dirty, but great for plinking - CCI Ammunition Blazer Rimfire .22 Long Rifle 38 Grain Lead Round Nose (LRN) Rimfire Ammunition

These are the same LRN Blazers that have been around forever. Same quality, rare to have a misfire, I'd say less than 1%. They're pretty dirty, and you'll definitely have to clean your gun after you shoot them (not just a boresnake, the action will need love, too). Some semi-autos with tighter tolerances will get finicky about feeding and extracting due to the fouling after a box or so. Other semi-autos eat them up and spit them out without any fuss.
Still, if you're looking for a tried-and-true plinking and target 22LR round, these fit the bill at a low price-per-round.
I've probably gone through 100 bricks or so in the last 3 decades, I trust CCI products and they're made in America!