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