I would think the 1-32 twist would shoot sabots. Although I would be more inclined to shoot conicals out of it. Perhaps some of the CVA Buckslayer Conical with around 90 grains of 2f, maybe some ball-ets in around the 270 grain range, or some of the medium to large conicals out there in the 300+ grain range, I would also look at the R.E.A.L. conicals in your caliber.

I have a friend that many years ago bought a CVA .54 caliber inline with 1-32 twist. We worked a lot of different loads up for the rifle but found that conicals were the best shooting thing out of his rifle. He took everything from deer to bear with it.