I have a 260 (I also have a Creedmoor but have not killed anything with it) that has taken several deer with 100 gr NBT at around 3250 FPS and all have been bang flops.
I was shooting the 260 long before the Creedmoor came on the market, but they are about the same balletically.

I may not be smart but I can lift heavy objects

I have a shotgun so I have no need for a 30-06.....