The ammo does the work, the gun is a tool for making the ammo work. The first thing you settle on is what ammo will do the job for you, and then you find a gun that works well with the ammo you need.
Particularly with a shotgun it’s important to make sure it reliably feeds the size(s) of shell you intend to use. Nothing wrong with pump.
I prefer 12 ga 3 in mags in #2 shot. Ive got an Ithaca double 26 in barrels with auto ejectors and double triggers. The auto safety disconnected. I carry two shells reversed in my left hand. We used to hunt like that. I fire two, break it, reload and fire two more before you can get four down range from a pump. Also got a model 37 Deerslayer with extended mag that is very slick. Get you a 30” X 30” piece of plywood. From about ten paces fire a magnum 00 at it. From the same distance fire a magnum #2 at it. Examine it.
00 is ok for deer and humans at close range. Slugs will penetrate a car. A load of #2 is going to shred a human.