Ruger, I used the Hornady 250gr SST's(same as you bought just TC packaged and sabot) this year behind 100 gr of T7 loose. Accuracy was awesome and gained improvements in trajectory down range over the 240 XTP I previously used. The bullet combo harvested 3 deer this year (1 mule doe, 1 whitetail doe and 1 whitetail buck). The mulie doe was the first game experience 171 LRF yard shot, double lung mid rib shot she travelled maybe 30 yards then tipped over, blood trail was typical of XTP (not lots but adequate) and virtually no difference in entrance or exit hole (complete pass through). The whitetail doe was shot by my buddy out of my gun, the deer was face on at less than 20 yards and boy did it travel, we found a good mushroom bullet tucked along the spine under the backstrap about mid way back(entered mid line of the neck), it held around 60% of it's mass and the deer never moved. My wt buck was a heavy quarter 75 yards, bullet enter the lungs and exited out in front of the shoulder on the opposite side cliping the bone and caused a bit of shoulder damage (1 1/2" exit hole). In this case we did find the peeled back copper jacket upon skinning but the core exited the body. Deer just flopped and never moved again.

Unfortunately I only had one classic rib shot so really tough to base on that. However I have heard similar reports so at this point I would say no great difference in wound channel (expansion) over the XTP. I do think it held together better than XTP, obviously the other 2 animals harvested it proved worthy of doing some sluggin'. The real payoff was the gained accuracy/trajectory, while the XTP has always proved reasonably accurate in my Rem 700MLS the SST better it and allowed me more room to tweak my charge.

PS yes I will be using them again next fall