Worc

With steel the added velocity makes a bigger difference than other heavier shot materials. Going from 1 3/8oz to 1 1/8oz you will be loosing about 15 pellets. Your energy per pellet will go up somewhere around 25% from 1,300fps to 1,550fps. Recoil energy between these two loads will be almost the exact same.

This where the 3 1/2" chamber shines for geese and steel shot. You can get the same 1 3/8oz at the faster 1,550fps.

I'd take the 1 1/8oz at 1,550fps if I were to use a 3" steel load for geese.