Be careful shooting 3" apex loads out of a 3" chambered gun. We got to test some of the first apex loads and I had a hunt ruined by one of their shells. The only conclusion we could make is that the shell was a little longer than the chamber, thus not engaging. This was in an 1187, so no "benelli click." Costed my buddy his first bird after working him till 11:30. Still makes me sick...
Wow, that is really strange; sorry you lost the bird.
I've heard of a lot of issues with roll crimped shells not feeding on a semi auto because they were too long. But I don't see how it could happen with a shell that was chambered. The 3" chamber is supposed to be 3" long so it can contain the entire hull after it's fired. An unfired 3" shell should be no more than about 2.75" long, even if roll crimped. Even shorter if fold crimped, and I suspect they are folding them to save time.
If you still have the shell, I'd examine it and measure the diameter near the end of it. My guess is they put too much pressure on the crimp and made the end expand too much to fit the chamber. I once had a factory load get wet and the end expanded like that. Fortunately it didn't cost me the turkey.