My 243 handi likes Federal Premium 70 gr NBT and 85 gr sierras, it does pretty good with 100 gr Rem corelokt, but the best it has shot to date with factory ammo was with cheap PMP 100 gr softpoints. I shot about 16 rounds that averaged 0.5" at 100 yards. I have not purchased any more of this ammo to try and repeate those groups but I will once I can get some range time in again. It may have been a fluke but if you find some it might be worth trying. I bought mine from Cabela's for $9 a box but you can get it online for about $7.