At 50 yards or less their ain' t noway you shouldn' t hit the bread basket and if thats the case meat damage is not an issue...or am I missing something here??? I would say 150-180, but a 180 may not expand leaving a pinky in/pinky out scenrio. Personally I want to put the animal & lots of blood on the ground and would be looking for something that will punch through with some decent expansion.
As to the bush beaters theory, ain' t no such thing! I have seen it first hand and nobody will convince me a 180 is more likely to finding way throw twigs vs 150. Hell one case was a 200 gr 338 win that hit one single branch and missed a bull elk[

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