I had an interesting thing happen a few months ago that I thought I'd tell you guys about.
I have an 11-87 that is in great looking and functioning shape, but literally, THOUSANDS of shell though it. It's about 15 years old and I've shot it a LOT. It is the old 11-87 SP model designed for use w/ 2 .75" and 3" shells.
This summer I was out shooting some trap at a farm with it and some buddies. I had a collection of odd shells, mostly 1oz game loads, in a plastic bin from cleaning out a closet. This was a mixture of Fed/Rem/Win shells so it was a combination of black/green/maroon/red shells. Well we shot a few, then when it was my father-in-law's turn, I manned the thrower and he grabbed a shell from the bin.
BOOOOMM broken bird. I thought it sounded WAY too loud in comparison to what we had been shooting.
I turned and looked and the shell was jammed in the action. Turns out a 3.5" lead turkey load (Federal #6) had ended up in the bin. The gun chambered the shell, fired it, and couldn't eject it. From looking at it, it MIGHT not have fully chambered it as the shell was a little deformed right infront of the brass. I took the gun apart, everything looked good, and we kept on shooting. Seems to be perfect.
I send a letter off to Remington (and a copy to Federal) just to make them aware. Remington wrote back saying that their guns were rated for 3.5", and basically, it shouldn't have happened, but was totally safe.
I just thought it was interesting that:
A) I had a friggin 3.5 in a bin of 1oz game loads
B) The gun chambered and fired it
C) My father in law picked it for his first shell, so he hadn't had the other shells in his hand for comparison to notice it looked like a roman candel in comparison.
D) It KILLED the clay target

E) Remington replied that it wasn't a problem at all.