In the last 16 years hunting whitetail I have taken 15 bucks with 140gr cup-core bullets in my 270 all with great 1 shot results. Last year I used 150 Fusion bullet (not quite cup-core but close) for the first time. The buck I shot was beaded at 220 yards and the bullet just clipped the onside shoulder blade and made a clean passthrough on far side. I would agree with above the entry wound was blood shot about the same.They are on the softer end of the spectrum. You’ll have no problems with expansion but may find you don’t get a pass through on larger bodied deer. Killed a 177# with a 150 SGK perfectly broadside impact velocity of 2864 FPS, no exit. Got quite a bit of meat loss around the entrance I’d say 5” around the entrance was blood shot badly.