BigS...we carried "Ranger" rounds which were manufactured for LE use. That helped but I think it became more of a legal issue than anything else and they didn't want to take any chances...so, when it came time for new equipment our department went with the 40's...Glock of course.
As far as knock down power and round placement...all my training (LE and military) was 2 to the chest 1 to the head. That usually "stops" them.![]()