This is a bad boy's round. Like others have said, it will take down any game animal on the North American Continent. The stats are from Wikipedia, and normally my brother and myself give a caution that the stats from this source are not always reliable, but in this case they are completely reliable as apparently Wiki got these stats directly from Remington. The stats are completely reliable.
Here are the specs:
7mm Remington Magnum Cartridge
Place of origin United States
Designer Remington Arms Company
Parent case .375 H&H Magnum
Bullet diameter 0.284 in (7.2 mm)
Neck diameter 0.315 in (8.0 mm)
Shoulder diameter 0.491 in (12.5 mm)
Base diameter 0.512 in (13.0 mm)
Rim diameter 0.532 in (13.5 mm)
Case length 2.5 in (64 mm)
Overall length 3.29 in (84 mm)
Rifling twist 1-9 1/2"
Primer type Large rifle magnum
Bullet weight/type Velocity Energy
140 gr (9.1 g) Soft Point 3,175 ft/s (968 m/s) 3,133 ft·lbf (4,248 J)
150 gr (9.7 g) AccuTip BT 3,110 ft/s (950 m/s) 3,221 ft·lbf (4,367 J)
160 gr (10 g) Soft Point 2,900 ft/s (880 m/s) 2,987 ft·lbf (4,050 J)
175 gr (11.3 g) Soft Point 2,860 ft/s (870 m/s) 3,178 ft·lbf (4,309 J)
Test barrel length: 24"
Source: Remington 
From your friends,
LittleDragon and Send it Boi
the difference, which is considerable, between the 7mm x 64mm remington and the 7mm x 66mm remington Ultra Magnum. these are two entirely different rounds.
ill keep this info in mind for future
Still like the 30 cal and the 408 CT. LOL