RE: shotgun slugs
Obviously accuracy is of the utmost importance. I am one who does not squeeze a shot on a deer unless I fully believe I am going to put my shot in the boiler room. I am not, nor will I ever become a hail mary hunter. So go ahead and try a few bowes of what intrests you and see what it does with your gun. You may be pleased, you may not or you may just feel there could be something a little better and to your liking.
Using an 12 gauge H&R USH I have one shot. Fortunately it always lives up to it's end of our deal. Personally, I prefer to hit a deer with the heaviest slug I can. Brenneke 3" Gold Mags & 2-3/4' Brenneke Heavy Field Mags.