7×61mm Sharpe & Hart

The 7x61mm Sharpe & Hart Magnum belted cartridge (7mm S&H Super) was developed by Philip B. Sharpe and Richard (Dick) Hart in the 1950s and based on the .300 H&H Magnum case. In 1953 Sharpe travelled to Scandinavia and the outcome of this trip was that Schultz & Larsen of Denmark chambered the cartridge in their bolt action rifles. One example being the model 54J, which featured rear locking lugs and a fully enclosed bolt face. while Norma started to manufacture commercial ammunition according to the designers specifications. But today the cartridge requires hand-loading. However hand-loaders have a variety of bullets to choose from, and Hornady lists load data for the cartridge. Brass is still available, or can be fire-formed from 7mm Remington Magnum cases.

7x61 Sharpe & Hart Magnum
Type	Rifle
Place of origin	Oakland,California U.S.A.
Production history
Designer	Philip Sharpe and Richard Hart
Designed	50s
Manufacturer	Norma
Specifications
Case type	rimless, belted
Bullet diameter	.284 in (7.2 mm)
Rim diameter	.532 in (13.5 mm)
Rim thickness	.040 in (1.0 mm)
Case length	2.394 in (60.8 mm)
Overall length	3.27 in (83 mm)
Ballistic performance
Bullet mass/type Velocity Energy 160 gr (10 g) 3,100 ft/s (940 m/s) 3,410 ft⋅lbf (4,620 J) 139 gr (9 g) Hornady SST BT 2,800 ft/s (850 m/s) 2,419 ft⋅lbf (3,280 J) 175 gr (11 g) Hornady Spire Point Interlock 2,900 ft/s (880 m/s) 3,267 ft⋅lbf (4,429 J)
Source(s): Hornady Handbook of Cartridge Reloading

Usage & Ballistics

While the 7x61 S&H Magnum is a good cartridge, it was overshadowed in the United States by the pre-existing 7 mm Weatherby Magnum. Never a popular cartridge in the U.S., when the 7 mm Remington Magnum cartridge was introduced it spelled the demise of the 7x61 S&H.

Performance for 175 grain 175 grain Spire Point Interlock bullet

	100 yd	200 yd	300 yd
Trajectory	2.6	1.9	-4.1

References

• http://www.chuckhawks.com/7x61_SH_Mag.htm