Deer is a Columbia Blacktail. The deer was shot quartering away. Here you can see the exit hole

The cartridge was loaded with a 300 grain .412" Woodleigh SN bullet producing 2,138 fps/3,045 ft lbs at the muzzle. The rifle is a Marlin 1895 re-barreled to .405 Grenadier - no other changes required.

The bullet was not recovered but you can see it expanded and performed as expected. This was the exit.