Yes they are. All you need to do is buy Hornady .452 XTP's and a harvester black high pressure sabot and you should have the same load. The problem with the SST's is they do not sell them in bulk. I think they do that because everyone would be shooting them and not buying their sabot combinations.

I have real good luck shooting the SST's and XTP's out of my Black Diamond and my Staghorn. They are good bullets. I like the 300 grains and the 250 & 240 grain combinations. Accuracy is outstanding with them.