I have had the best luck with Winchester 555 bulk packs from Walmart. They group well and feed in all my semi-autos. They have a large cavity hollow point and are great on squirrels. Federal bulk packs are pretty good too. CCI mini mags are great, but pricey. Stay away from all Remington rimfire ammo.
Winchester 100 .243; Marlin XS7 .308; Stevens 200 .223; Rossi 92 .45LC; Marlin 1894C .357M; Marlin 30AS .30-30; NEF Pardner Pump 12ga; Mossberg 500 Turkey 20ga; Winchester 1200 20ga; Savage Mark II F .22LR; Henry H001 .22LR; Marlin 60SB .22LR; Ruger 10/22 DSP .22LR; Browning SA-22 .22LR; Savage 93R17 GV .17HMR; Remington Genesis .50 cal ML; Ruger SR1911 .45ACP; Ruger Vaquero .45LC; Ruger Blackhawk .357M; Ruger SR9c 9mm; Ruger Single-Six .22LR; Browning Buck Mark Camper .22LR