Yeah the load should be mostly accelerated by the time the wad passes the gas port anyway.
Could be this cop doesn't have very good aim. A winging shot could definitely leave someone combat effective.
Could he be talking about birdshot? I could see that.
Place your rounds center mass and you won't have those problems, even with smaller rounds. Even a well placed .22 will kill or disable, but with something that small it is of course all about placement.
A weapons test, purely for the hell of it, yesterday showed that 9mm Luger FMJ does NOT penetrate a keg shell from about 10-15 yards unless it strikes a seem or a previous impact. I've got some totally flat and polished cores to prove it. Bird, buck and slugs all have no problem whatsoever. 2 SKS's, needless to say, turned it into a colander. The birdshot had about a 1.5-2 inch spread and forced its way through the front, but not the back, because of its focused energy.
I can say that I've seen buckshot blow clean holes through a solid belt buckle before too. I could see maybe 3 count having a couple pellets miss for some reason (bad aim) and only one not hitting critically.
My friend is looking to buy an auto-shottie. We don't really have any experience with them. What would you guys recommend?
Also, we noticed that we only find them in 4+1. Is this a legal thing? Do the mag tubes incorporate the gas piston or could they potentially be swapped with a standard pump tube?