Sorry to hear you lost the deer. That really is too bad. That deer should have went down and stayed down if hit good.
I was all set to prove that a 295 grain powerbelt and 80 grains of 2f would take a deer easy.. now you have me questioning my selection. The rifle also shoots a 300 grain XTP with 90 grains, so I know that might be the ticket.
It is a shame you could not find that deer and examine the wounds.