I shoot an identical gun. It still has the factory tube and i would shoot it before buying an aftermarket because mine patterns great with 3-1/2" Winchester Turkey loads #4' s. I have taken over 20 turkeys with this setup and have never missed one that was in the 10-40 yard range not many over 35 yds but when i have stretched it i have never failed. that 0-10 yard thing can be different i have missed a couple.........you may ask how but trust me when you are shooting that close it is pretty much a solid bullet coming out there and the turkeys i hunt dont seem to know how to hold there head still enough.