I used the 300 grain Swift A-Frame in the .375 Ruger. It performed flawlessly on wildebeast, zebra, kudu, warthog, and impala. I would not have wanted to be wandering around the Zambezi Valley with anything lesser. I would have been able to take my buffalo and hippo without a problem in the unlikely event my M77 in .458 lott failed. I used the 500 grain A-Frame for the first shot on my buffalo. I am a beleiver in the A-Frame! Used Hornady solids after that.