I plan on shooting Hevi-Shot in 1 7/8 load, 3.5" shells through my Benelli Nova, using, as recommended to me by someone who has patterned these loads through this gun, a factory Modified choke. I just have not settled on shot size. Not just as to Hevi Shot, but for turkey loads in general, what are the pros and cons of 4' s vs. 6' s. I have historically shot 4' s, but some friends recommended 6' s. How much knock down punch do you give up moving from 4' s to 6' s and is it worth the extra number of pellets? I know this is a Ford v. Chevy, Bud v. Miller, Snickers v. Butterfinger question, but observations are apprecitated.