All I use is Sierra Boatails and Ballistic tips out of my hunting rifles. I currently only have a 270 win, I shoot 130 Ballistic tips at our Canada Monsters (our deer are no skinny 110 lbs, many tip in the 275 plus range on the hoof) I can think of only one true tracking test and that wasn't the bullet fault but the shooter (who remains faceless) put it smack in the shoulder. In this case the bullet came completely apart, it busted up the shoulder and screwed a lot of front end meat. But again it wasn't the bullet, but the guy who put it their in the first place. All other lung shots it was minimal and I have had always complete pass throughs, with good blood trails. Most of my deer come down either on the spot or less than 50 yards.

I hunt some wide opens, but a lot of big bush as well....either situation no problems.

I would feel confident with ballistic tips in, but if your Sierra's are yielding you good groups why bother!!!!!