Is there such thing as a Trust Your Life with it shotgun?
I think so, but I wouldn't put anything NEW on my list.
All the gun manufacturers decided about the same time that chambers did not have to be mirror smooth, Unfortunately about the same time the ammo makes started using steel bases. Problems ensued.
Not having been much involved with shotguns in recent years this is news to me, and sad news, indeed. Steel bases in shotshells means that new ammo is no longer trustworthy, to me.
I'm an old guy, and I have old guns, and I trust them with my life, due to decades of personal experience with them. Am sad to hear about all the problems with the 870 Express, I bought one, either the year they came out, or shortly after, and it's been FLAWLESS. However, from what I hear, newer ones aren't. Originally the Express was simply the 870 wingmaster without engraving, a "parkerized" finish, blued bolt and a plain stock.
Apparently, they are not like that today.
I wouldn't bet my life on anything "new" or "out of the box". Arms, and ammo for personal defense should be tested. USED until you're personally confident in their operation. No matter who's name is on it, or how much you paid.
The 1920s mfg Winchester Model of 1912 that I've owned since the early 1970s has my full faith and confidence. I would trust my life on that gun working when I needed it to. NOTHING "out of the box" today has that. They might earn that level of trust, but they won't get it, until its earned.
An esoteric question for you all, since shotguns are low capacity weapons used in CQB, one may need to use it as a club. I've never hit anybody with the butt of a shotgun, but does butt-stroking an assailant with an aluminum receiver with polymer stock shotgun versus a steel and walnut shotgun have an appreciable effect? More mass theoretically should result in more force based on Force = Mass x Acceleration. In the real world, does it matter?
I'd say it matters. Might matter a lot, if you need to hit someone with the gun a
second time...
I'd say it also matters if you expect to use the gun as a gun, afterwards, too.
This is also why I favor steel frames on my pistols. I'll put up with the heavier weight to carry because when everything else fails, your gun is an impact weapon and very badly needed to be the most effective one possible at that point. Light weight alloys and plastics are simply not the best materials for that job. True, the odds on needing it are uber slim, but if you do need it, you need it badly, and I'll put up with the hassles of having it, so that if I do need it, it's there. But, that's just me...