I actually was getting the best pattern with 3" shells so that was the majority of what I shot.
I would like to get the full benefit of 3 1/2's
If the 3" inch shells gave you the best patterns, I'd be shooting them. If the 3 1/2" shells aren't patterning as well, then there is no benefit to shooting them, you're just blowing your shoulder out of socket for nothing. Whatever puts the most pellets in the bird is what I shoot.