I use these in my Springfield XD tactical, never had a problem, they shoot great.
They're for use in a .45 ACP (.45 Auto, .45 Automatic Colt), not a .45 Colt (.45 Long, .45 Long Colt, .45LC). They may not cycle well in some semiautos, though. They're only good for pests, nothing bigger than a rat or a headshot on a snake at close range (10-15ft). They're not for other hunting or self-defense, there's just not enough power.