I agree, patterning your turkey shotgun is like sighting in your deer rifle, it just needs to be done, except you don't have to pattern every year. Spend the time with a variety of shells of 3 and 3.5" to see which one shoots the best. I've seen 3" outpattern some 3.5" and the other way around. It is really just a matter of what your gun likes. Once you figure out which one patterns best at like 40 yards, you should be able to find one that hits out there good, you can step back to 50 yards with that round and see what it does. I like to think that about 40 yards is the longest range I will ever shoot a turkey. Those little balls start losing velocity quickly out at that range. They may pattern good, but the oomph is starting to disappear. I read and hear and know people that shoot longer shots than that at turkeys, but that is my personal feeling.