I've seen 3-4" grouping @ 50m, so they're not too bad, on the other hand, I've seen shot's all over a double bedsheet, that was used as a backdrop behind a 12" target (that's with a rifle by the way !!!) a pistol, I'm averaging around 65 @ 20 yds on a standard 9" pistol target.

Overall, it depends on the weapon and the person using it.

ATB
Baz