I have not used the exact bullet in question, but from my experience with other SSTs I find it hard to believe there was a lack of expansion. The 95 grain 6mm, 165 grain .308" and 120*** grain 6.5mm have been really good deer bullets in my camp.
***Yes 120, not 129. The 120 was one Hornady made for 260 Remington factory ammunition that my nephew has used.
