db3, are you using buckshot or slugs? Personally, I'd stick with buckshot. At that height, you'll get a better pattern and more effective killing range; but 100 yards ain't gonna happen. If you're using slugs, then you absolutely need to pattern the gun (which you should do anyhow) to see just where the slugs will be hitting the deer at that angle. I just remembered, you said you are hunting on Sumter National Forest, since that's a Federal WMA, you are required to either shoot slugs or use a muzzle loader, and center fire rifles are prohibited. That makes a world of difference as to line of sight from other potential hunters as well as places limits on how far you can shoot, so you shouldn't encounter any of the problems I at first was concerned about.
Good luck, but still take precautions, I've heard some pretty wild tales about some of the idiots that hunt that particular WMA. Watch out for the game thieves...........there used to be problems with guys who would steal other peoples deer up there, and they were a nasty bunch of S.O.B.s!!!!!!!
NRA LM, NAHC LM, Buckmasters LM, The Second Amendment Foundation, GOA, NAGR, Palmetto Gun Rights, QDMA, DU, NWTF, ASAdisabled sportsmens' alliance, EDH, and Proud SC redneck REBEL for life.