Deergrower,
This can be tricky and most shooters go teh wrong direction and try to drive very light bullets extremely fast hoping to keep the bullet in the yote which with any 270 bullet is nearly impossible to do.
The best thing I have ever seen for using deer calibers on yotes and still leaving the pelts intack was to use a controled expansion bullet what one would use for big game hunting.
Simply using a 140-150 gr bullet loaded to 2800 fps will do less pelt damage then a ligher bullet.
You will get exit wounds, no way around that, but the heavy big game bullets will expand very little and generally produce smaller exit wounds.
Whatever you do stay away from the tipped bullets as they will skin the dog for you.
Good Shooting!!!
Kirby Allen(50)