From American Rifleman, Volume 70 (1922):
Western High Velocity 30-30 Cartridge
The Western Cartridge Company has just developed a special 30-30 high velocity cartridge that brings the old type 30-30 rifle up to the modern high-power standards. This new cartridge is supplied with 150-grain open-point Lubaloy bullet which gives much flatter trajectory, especially at long ranges.
Many tests that have been made with this new cartridge demonstrates conclusively that it has remarkable striking and penetrating qualities which make it particularly desirable for big game shooting. ln one test this bullet penetrated one-quarter inch of boiler plate at 100 yards, with sufficient remaining energy to enter a back stop several inches.
While this new cartridge has been speeded up to 2,370 f. s. the pressure developed is lower than the old standard type. The Lubaloy jacket gives the added advantage of absolutely preventing metal fouling in the barrel. Notwithstanding the open-point construction, this bullet gives accuracy equal to the full metal patch bullet; it has tremendous destructive power on big game.
BALLISTIC DATA
The new Western 30-30 High Velocity Cartridge Compared With the Standard 170 Grain.
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.................................High Velocity............Standard
......................................150 grain............170 grain
Muzzle velocity.................2,370................1,940 f. s.
Muzzle energy..................1,870................1,420 ft. lbs.
Velocity at 100 yards.........2,105...............1,710 f. s.
Energy at 100 yards..........1,472...............1,110 ft. lbs.
Trajectory
100 yards.........................0.85..................1.18 in.
200 yards.........................3.62..................5.88 in.
300 yards.........................10.02...............15.34 in.