There's no controlled expansion BG bullet in .277" I'd hesitate to use from a 270 Win on an eating sized cow elk. I've personally used ballistic tips and partition's on them from the 270. Have seen them taken with a wide variety of factory 130's.

Your SST will be perfect.



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