These Barnes TAC-XP all-copper bullets are 160g. .451s, loaded to about 1100FPS (at 10') and shot in my Glock 37. As usual, I shot these into a string of 1-gallon waterjugs from 10 feet. No bullet penetrated into the 4th jug. The LH and center bullets passed thru 4 layers of denim taped onto the 1st jug; the 3rd was 'bare'. Retained weight for EACH bullet was 160g. (rounded to the nearest whole number) for a retention of 100%!!!!!!!!!!! I'm impressed even more now--see http://www.glocktalk.com/forums/showthread.php?t=1356994 ...for my results with my 357SIG. Last nite the 125s became my PD bullet for my carrygun; today these .45-cal. 160s became my PD bullet for my 45GAP.