Bullet integrity is faaaaaar mor important then it's weight.
I used the 300WSM with a 165 gr Barnes triple shock..... in retroscope prob should have used a bigger gun. Called the bull out of the thickets at 200yds. Broadside shot, guide said he thought I missed as it didn't even flinch.. second shot same...third...same. Guide was worried Id missed him. He went down 25 min later as hadn't come out with me on the ridge above the bog and spruce thicket...he had only gone 10 ft in (couldn't see from above though) I had hit him all three times lung and heart.