I would not use the standard Hornady SST bullets. I would use the Hornady SST/ML bullet. Hornady made them to expand at muzzleloader velocities. I know a lot of people swear by the SST and say they have killed many deer with them. I have also heard some people say that they don't expand well. I don't know what they were shooting for a load or the ballistics of the bullet they were using. In 1984 I used a renegade and a 430 grain maxie hunter, literally no expansion what so ever from that bullet, I also killed a lot of deer, but there was never a blood trail. If I didn't see where the deer dropped I would have never found most of them, I never lost a deer because my shot was always spot on, in the lungs.
You don't want a bullet that will pencil in and out, or not expand at long range. Do yourself a favor and try the SST/ML, It is also the most accurate bullet in my box, in a 1" square I can put 6 SST/ML bullets. Post back and let us know how the load you select does.