dawaba I have not used them on buff but have used the screw machine 270 gr on brown bear,as has a friend.
They did a bang up job both times.
Couple of touring African pro's tried to buy our stash of 270 and 300 gr screw machine bullets back in the day....apparently they thought highly of them.
Back in the early 80s, I believe, before Nosler resumed manufacturing the 300 gr Partition, I had a good friend offer to buy two boxes of the old bullets from me for a dollar each (that was back when a dollar was obscene money to spend on a bullet). I declined, because I was unsure if Nosler would ever make any more 300-gr PTs. About a week later, he upped his offer to a buck-fifty each. Still, I declined.
Later, Nosler started making the bullet in the new style, and my buddy bought a truck load of them! He still shoots them in his Sako .375 Holland.
