Congrats on the deer.
sst's are the same bullet as the shockwave
With one minor difference. The 250 grain SST has a soft plastic tip. The 250 grain Shockwave has a hard plastic tip. After killing a lot of wild hogs and deer using both bullets; i think those two bullets sometimes act differently. But i can't prove it-yet.
It may be that the SST expands better at long range and lower velocity.