The 25-06 Remington was originally a wild cat calibre until standardised by Remington in 1969.
(Left: The .25-06 is an unusual choice, but none the less a great option for stalking in the highlands where longer shots are often required)
This cartridge is basically a flat shooting necked down 30-06 Springfield, which can be used with bullet weights ranging from 90 - 120 grains. 120 grain bullets produce around 2990 fps and 2380 ftlbs of energy at the muzzle.
Although having less of a kick than a .270 or .30.06, I found the recoil to be a little snappy. That said it has an excellent ballistic coefficeint and is therefore very flat shooting and able to produce plenty of down range punch.
Due to the flat trajectory, this is a great calibre for use in the highlands, or for use on light skinned plains game. That said it is little seen amongst UK deer stalkers, who, if hunting at longer ranges, seem to prefer the .270 or .308 Winchester.
Perhaps as a result of the UK's deer stalkers being reluctant to adopt this calibre, ammunition is not easily found, and when it is located, can be a little on the pricey side.
Typical ballistics (120 grain bullet)
Muzzle Energy: 2380 ft/lbs
Muzzle Velocity: 2990 fps