I had a 264 Win. Mag. for a time, shot some big game with it, includeing one brown bear. Actually, i wasn't too impressed with it, and went to a 7mm Rem. mag... I found the 7 mag. to be a MUCH better big game cartridge, and i never looked at the 264 mag. again.
All of these cartridges are waaaaaaay more than is needed for deer sized animals, so i'm sure if deer in on your menu, it will work very well for that purpose.
DM