For just deer in a 308, a TTSX over 150 is more bullet than you need, and velocity is your friend with a TTSX. Thought about the 130gr TTSX? I prefer regular cup and core for anything over 223 or so, for deer or hogs. Going bigger? Sure. Your bullet gets more help being violent on big stuff, and penetration is harder to come by. Just my opinions. There’s just not gonna be much difference in some of the stuff you already use, unless you go heavy and slow it down and decrease expansion too much on deer.