Have used 'em for years. Never had any trouble with them. At all ranges. I once shot a deer 10 times. He just wouldn't go down and stay down. Bad bullets? Nah everyone was in a good kill zone. Most were at very short range. He finally rolled over and played dead. I was kinda young and just knew that ol deer was gonna get away. That was with a shotgun and slugs. All except one were clear through. The only bullet I can say for sure that ever didn't work right was a 46 gr OPE in a 220 Swift. Hit a groundhog at about 50 yds. Killed him. ..almost skinned him and never penetrated past the skin. I guess most any bullet can fail at one time or another... either from outside influences or possibly a bad bullet. Does happen occassionally I guess. We always remember the bad things that happen...hardly ever all the good things in life