I shot SST's last year. Killed a buck, ZERO expansion. Hole coming out was the same size as the hole going in. My dad, brother and I all switched to Barnes TMZ's this year. So far 4 deer have been killed with great blood trails and expansion from the bullets. And just FYI, both the TMZ and TEZ are the same bullet, the TEZ just has a slightly thinner sabot for easier loading. We are shooting the 290 grain bullets. They have a higher KE and flatter trajectory compared to the 250 grainers, even at slower speeds. Barnes are fantastic bullets, unless for some reason your gun won't shoot them well, you won't be disappointed.