User:BradWolverton/sandbox

The 7 ELR-h™ is a wildcat cartridge for the gaining popularity of long range hunting. Co-developed by Roberts Precision Rifles and Sendero Ammo, the 7 ELR-h is a .300 Norma Magnum case necked down to .284 caliber with a 30° shoulder angle and increased case capacity over the parent case. This cartridge was named 7 ELR-h to differentiate its unique cartridge dimensions from other 7-300 Norma Magnum wildcat variants. The ELR-h standing for Extreme Long Range hunting.

Utilizing a larger bolt diameter for the cartridge the action footprint and rifle size is otherwise unchanged from a standard precision field rifle chambered for a magnum cartridge and feeds from a .338 CIP magazine.

Use
The 7 ELR-h cartridge shines as an open country hunting cartridge for all North American game where long range shots may be required. Loaded with modern high BC hunting bullets such as the Berger 195-grain Elite Hunter at 3,150 ft/s (960 m/s) the 7 ELR-h delivers 1,729 ft-lbf at 1,000 yards (914 m) and a time of flight less than 1.2 seconds. This retained energy and short time of flight provided by the cartridge aid in ethical shots on game at further than traditional hunting distances.

Suitable for long range target shooting such as ELR along with field matches similar to those hosted by the Precision Rifle Series where a man portable, magazine fed, rifle that can provide high shot probability beyond 1,200 yards (1,097 m) is desired. For this application the Sierra 197-grain MatchKing and several 180-grain match projectiles are well matched to the cartridge with the 197-grain Sierra providing supersonic velocities out to 2,000 yards (1,829 m) with less than 20 milliradian of elevation adjustment from a 100 yard zero.