I had also tried out 240gr Thompson Center Mag Sabots with XTP bullets (below). I chose not to use them because unlike the SST's it appeared I couldn't get repeated accuracy without taking the rifle down for a thorough cleaning between shots. The first shot from a clean barrel had the same point of impact as the SST's, the second shot went roughly 3inches high, and the third was off the paper. The Sabots with the TC bullets were much harder to load especially on shots 2 & 3 with a "dirty" barrel and my supposition was that they were slower exiting the barrel than shot 1 and the additional time was pushing the shots high due to muzzle rise.
Having not had a chance to evaluate either bullets performance on deer I went with the one that didn't require me to take apart the rifle and clean it before I reloaded.
Now that I have had the experience with the SST's I'm definitely going to find something else. At least one thing I'm going to try since I have them is loading the XTP bullets in the red SST sabots and see what happens.