RE: 16ga???
Perfect size. I use a 16 ga. Ithaca 37 about 70 percent of the time. Switch off sometimes with a 20 ga. SXS or a 20 ga. Rem. 870 Wingmaster. One thing, I wouldn't get a 16 ga. on a 12 ga. frame. No real benefit when it comes to weight. Might as well go with the 12. Recoil wise, generally there's little difference.