agtman said:the Sig 220 is a fine pistol (I have a pre-Wall tear-down model, i.e., made in "W.Germany.") But it isn't more durable than the all-steel tanks of S&W's 3rd Gen. 45XX-series line
I don't know about "more" durable but the Sigs are certainly durable. Mine is also a Made In W. Germany model. The thing I don't understand is why so many think a gun has to be all steel to be as strong as possible when actually other metals and alloys are actually stronger for their weight. Not only that but plastic can be stronger than steel. Spectra fiber is 5 times stronger than steel per weight. Carbon/carbon composites are stronger than steel. That's why the B2 bomber is made up in large part of that material. That's basically another type of plastic too or close to it. Also you can mix an alloy of nickel, aluminum, titanium and other elements and get a much stronger material than steel. The Sig frame is made up of alloys of that nature.
All of these materials have different strengths and weaknesses. But to just put steel at the top of the list is 19th century thinking to be honest. I know it's strong and it's proven and it has characteristics that work well as gun making materials. I'm not saying it's bad by any means and there are certainly guns that are made of plastics that are nowhere near as strong as steel. But in the case of the Sig I think it's not certain the frame material is weaker than steel. I don't know either way for sure. I'm just not going to assume one is better because I just don't know. I do know I saw the torture test videos that were part of the original story I linked to and it was amazing what they did to that Sig. I mean it was amazing what it withstood. When you shoot a pistol with another pistol (as in make it a target and shoot it) and the gun still works after a direct hit then you know that gun is pretty durable.
Float Pilot said:They did become less accurate over time because I fired them every week and the frames took a battering. ( Firearms instructor which a huge ammo allotment )
How much ammo do you think it took to make them less accurate? I've fired mine about 15,000 rounds or more and I haven't noticed any drop off in accuracy. I bought it used too so there's no telling how often it was fired before I bought it. I believe it was a carry piece and it probably wasn't fired more often than it took to qualify though. It was in good shape when I bought it. Maybe the accuracy has dropped off slowly and I just didn't notice. BTW I really like 1911's too and I fully intended to buy one when I got my Sig. Now I'm glad I couldn't find a 1911 I wanted that day. Actually I did try to buy one but my brother in law wouldn't sell it despite me offering about $300 more than it was worth because I knew he was struggling and I wanted to help him out. His loss I guess. He sold it for less than it was worth not long after that. Maybe it was a personal problem. It was a personal victory for me though.