Will,
I've done a fair amount of smithing on pump guns since the 3 1/2s came out. Of those that have been brought to me with hang up problems reported, it's been pretty even across the board. One thing that I have noticed is that after going over the guns I go over operations of a 3 1/2 with the owners. They typically,(not always) use the pump the same with all lengths of shells. Meaning they work the mechanism the same with a low brass 2 3/4 as they do the 3 1/2. If you do that you will have hangups! The 3 1/2 pump action needs to be worked HARD. If not, it won't have the right stroke to clear the spent casing and will result in improper wear down the line.
Pick the gun that pulls up and fits you best, and work it like the hardware it is.
I've done a fair amount of smithing on pump guns since the 3 1/2s came out. Of those that have been brought to me with hang up problems reported, it's been pretty even across the board. One thing that I have noticed is that after going over the guns I go over operations of a 3 1/2 with the owners. They typically,(not always) use the pump the same with all lengths of shells. Meaning they work the mechanism the same with a low brass 2 3/4 as they do the 3 1/2. If you do that you will have hangups! The 3 1/2 pump action needs to be worked HARD. If not, it won't have the right stroke to clear the spent casing and will result in improper wear down the line.
Pick the gun that pulls up and fits you best, and work it like the hardware it is.