Well in the UM I personally like the 500 grain. I want to size some of the ones I have casted and then see how they will do. The UC Shorts do real well out of the UM so I figure they should shoot well out of the GMB. Although that 375 gr sabot with 100 grains under it would be more then enough to handle most anything. With the 1X scope it is legal in Wisconsin and would make a very interesting load to hunt with.