I have had mixed results using a 264WinMag and 95g V-max bullets (similar to a 270wsm ballistically using 90g or 100g hps or 110g v-max)
Some dogs have had exit wounds and suprisingly about as many didn't and several that didn't were shot relatively close like around 150 -175 yrds
No exit @174yds 264WM 95 grain v-max @ about 3300fps
No exit @ approx 150yds same load with 264WM (correction,very minimal exit about half the size of a dime,where I suppose a piece of the jacket made its way through!)
This hide was taken from one that was walking diectly at me with a different rifle but still a 264 using 95 grain v-max and similar load to the former pics.
He was hit at 187yds in the cheek and the bullet travelled through his neck down into his cavity never exiting
Yes I have shot many broadside that did exit a bit nasty aswell.I have used the 85 grain Sierra hollow point out of my Sendero in 264 and had mixed results with it too,but do remember at least two that had no exit at all using the 85g hp's.
I say get some frangible light .277 bullets and have at it.
Just sayin !