RigbyUser - Can't argue with your experience. I was just posting what I would choose if starting from fresh - the most important thing is that the rifle shoots the bullet accurately and the bullet has sufficient penetration.

However, I don't think what you post above disproves the SD thing. My personal opinion is that large calibre solids are rarely justified on buffalo so I'm not surprised you got pass throughs, but you can't compare 535gr solids with 570gr softs. I would agree though that if you found that the 570s shot best in your rifle, then you found the best solution for you and your rifle.

Good hunting!