There is a guy on another forum with 00 field grade 12 gauge LC Smith that is pre-1913. He was asking if it was safe to shoot factory loaded 3" TSS turkey loads. He and other family members have been using regular 2.75" field loads in it for years, and also using it for turkey hunting with 3" lead loads and even some 3" Hevishot loads. He says it will chamber a 3.5" shell, but he hasn't shot one. He has been advised to shoot proper shells for it, but it's apparent that he is going to continue to shoot what he has been using.

I was wondering how it can even chamber a 3" shell, much less a 3.5?