.460 Weatherby Magnum - Parent Cartridge

Parent Cartridge

The large capacity the availability of cases makes .460 Weatherby Magnum a likely candidate for various forms of conversion and experimentation. The .460 Weatherby Magnum has served as the immediate parent cartridge of several proprietary and wildcat cartridges. It is, however, also correct to list the .378 Weatherby Magnum as the parent cartridge for these cartridges as the .460 Weatherby Magnum itself was based on the .378 Weatherby Magnum case. The following are some of the better known cartridges based on the .460 Weatherby where the .460 acted as the direct parent cartridge:

.460 A-Square Short

The cartridge is a proprietary cartridge designed by Arthur Alphin of A-Square. This .458 caliber (11.6 mm) cartridge is based on a shortened .460 Weatherby Magnum case which can be used in a standard length action rifle. The cartridge is capable of developing 6,670 ft·lbf (9,040 J) when firing a 500-grain (32 g) bullet at 2,450 ft/s (750 m/s).

.465 H&H Magnum

The cartridge was designed by Russell Wilkins and Holland & Holland and released in 2003. The cartridge is capable of firing a .46 caliber (11.7 mm) 480 gr (31 g) bullet at 2,385 ft/s (727 m/s). This cartridge is designed to work at moderate pressures.

.475 A&M Magnum

The .475 A&M Magnum is a .47 caliber (12 mm) wildcat cartridge designed by the Atkinson & Marquart Rifle Company of Prescott AZ. It is based on the .460 Weatherby Magnum necked up to accept a .475 in (12.1 mm) diameter bullet. The .475 A&M Magnum is capable of launching a 500-grain (32 g) at 2,980 ft/s (910 m/s) for 9,860 ft·lbf (13,370 J) energy.

.500 Whisper

The .500 Whisper was disigned by J.D. Jones of SSK Industries. It is based on a shortened .460 Weatherby Magnum case which is then necked up to accept a .510 in (13.0 mm) VLD bullet. It is capable of firing a 750-grain (49 g) at 1,050 ft/s (320 m/s).

.50 Peacekeeper

This cartridge is another one of J.D. Jones' designs. It is essentially a .460 Weatherby Magnum necked up to accept a 750-grain (49 g), .510 in (13.0 mm) diameter VLD bullet which it is capable of firing at 2,205 ft/s (672 m/s) for 8,100 ft·lbf (11,000 J) energy.

.500 A-Square

The .500 A-Square is another proprietary cartridge designed by Arthur Alphin of A-Square based on the .460 Weatherby Magnum necked up to accept a .510 in (13.0 mm) diameter bullet. The .500 A-Square is capable of achieving 8,127 ft·lbf (11,019 J) energy with a 600-grain (39 g) bullet launched at 2,470 ft/s (750 m/s).