So this thread is about the .277 / 150 version of the SST and NBT, not the .308 or other versions.

I’ve never used an SST, but the Last time I used the 150 NBT from a 270 I shot a good sized cow elk at around 200 yards. Bullet went through the chest and exited. Elk ran 20 yards and was dead. Hard to get better than that.

Aside, my partner shot a cow simultaneously and at the same range with his 300 WM and a 180 Accubond. His cow reacted the same, running 20 yards til it fell over dead. However, the Accubond didn’t exit.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery