A hard hitting round featuring Barnes' excellent lead free TAC-XP bullet. 100% weight retention and extreme expansion make this one of the best hunting AND defensive bullets available. Boasting 17.25 inches of penetration with .86 inches of expansion, whether it is a trophy bull elk at 30 yd, or a home invader in the middle of the night, the 10mm 155 grain Barnes TAC-XP will get the job done.