The old model of softs and solids for buff are somewhat dated. Many PHs have gone to recommending TSX or something like that to cover all bases. I have some experience with the CPS in 416 Rigby on ele, eland, zebra, etc. That bullet has a noticeable loud impact sound and seems to send a good bit of shock into the animal. The ele fell within 40 yards on a heart shot...the eland was shot in the root of the tail and immediately fell at a dead run after 6' of penetration from back to front...zebra had both shoulders broken and a visible wall of dust lifted all the way down the spine upon impact. PHs talked about the hits of the CPS for days afterwards. I wouldn't hesitate to use the CPS on any buff on the planet for my first and following shots.