Copper Impact ammunition is engineered specifically for big game hunters, utilizing a tough solid copper expanding projectile that provides more impact trauma, better energy transfer, and larger would cavities for faster knockdown.ROUNDS PER BOX:20ACCELERATED EXPANSIONLarge diameter polymer tip delivers rapid impact traumaFLAT TRAJECTORYHigh ballistic coefficient bullet with engineered boattail improves long range flight characteristicsLETHAL ON BIG GAMEDevastating performance on deer, elk, and anything in betweenSUPREME ENERGY TRANSFERSolid copper construction maximizes retained weight