The beretta 391 series shotguns are the standard all other autoloading
shotgun are measured by. All thought there is no one shotgun that does
it all. That one is as close as it gets. With the stock shims and difterents
length but pads you should be able to fit it well. As for reliability, if you keep
it clean and oiled you should have no problems. I have a friend who put over
1000 rounds thru to see if it would jam. It didn't, he cleaned it because it
started to kick too much. I'm looking for a 12 gauge sporting myself. It is
one of the most pleasant shotguns to shoot. They swing well with very
little recoil.
Good choice IMHO.