Sometimes ... like any other bullet, it depends on how and where the deer is hit whether you get a pass through shot or not. However the bullets that stay in the deer cause so much internal damage (if you hit them in the vitals or close to it), that they usually either drop on the spot or never go very far. Several of my friends and I have used the 85 HPBT's with exceptional success for many years and all of us believe that the HPBT's kill deer much faster and cleaner then the 100 grain bullets do. I'm not going to brag about how may deer we've killed using this bullet, but I will say it's been quite a few ... and it's kind of nice to be able to use one bullet for both varmints and deer hunting. Also remember this is a Gameking bullet and is jacketed much heavier then a standard varmint bullet. If you don't believe me, ask Sierra. Ben