300 H H Magnum Ballistics

The case was belted like the 375 h h magnum and is based on the same case as also is the 244 h h magnum the belt is for headspace as the cases shoulders have a narrow slope rather than an actual shoulder.

300 h h magnum ballistics. 300 winchester short magnum wsm load data. The 300 h h mag. 7 62x51mm nato load data. In 1959 there was no other 300 magnum save the 300 weatherby than the 300 holland holland belted magnum.

Released in 1925 the 300 h h or super 30 as it is also known was the fourth cartridge from holland holland to wear that now famous belt of brass after the 375 velopex the 275 h h and the. 300 weatherby magnum load data. The 300 h h magnum cartridge was introduced by the british company holland holland as the super thirty in june 1925. Powders with burn rates equal to or slower than 4350 will generally yield good results.

Is a bit much for lighter game such as pronghorn antelope but if it were all i had i would load a streamlined bullet weighing 130 to 150 grains for the flattest trajectory. The 300 h h magnum can be hand loaded to produce velocities of 3250fps with 150 grain bullets 3000fps with 180 grain bullets 2800fps with 200 grain bullets and 2600fps with 220 grain bullets. 300 holland holland h h magnum load data. The 300 h h is one cartridge that works best with the hotter ignition of a magnum primer.

In 1935 a decade after h h had produced the 300 h h it received its first real attention when american long range shooter ben comfort used a griffin howe 300 h h magnum to win the 1000 yard wimbledon cup. More modern magnums continue this practice but headspacing on. A mv of 2 574 fps for the top load with any powder for the 300 win. 300 winchester magnum load data.

This load in the 300 holland gave a mv of 2 650 fps vs. 300 rem short action ultra magnum load data. The 300 winchester magnum was still four years away and the h h ruled supreme. That said those who own collectable rifles may wish to utilize softer lower wear hand loads of around 100fps slower than the velocities listed above.

The 308 norma magnum introduced in 1960 showed that the ballistics of the 300 h h magnum could be reproduced in a long action rifle and winchester s 1963 release of the 300 winchester magnum spelled serious trouble for the 300 holland holland. The 300 h h can exceed the maximum velocity of the 300 winchester magnum by about 75 fps with the 250 grain barnes bullet in front of a maximum load of 67 0 grains of h4831 powder. 300 remington ultra magnum load data. 30 378 weatherby magnum load data.

The 300 h h magnum is based off the 375 h h magnum.