I never seen the Winchester Supreme ammo with the powerpoints. Either is a Ballistic Tip, Failsafe, Accubonds (these 3 are the black Lublox coating) or the Partition Golds which have a grey moly coating. Anyhow the PP 150gr will be good. I would be a bit concerned if they were the Failsafes-great bullet on larger big game, but sometimes didnt expand on smaller game. I use to shoot Winchester Sumpreme Failsafes for years in my 300WM. I never lost a deer with them, but recovered a bullet and it didnt expand like ones recovered from moose and elk. Winchester Supreme Accubonds would be a great bullet for your 270 for any big game animal.