.300 Sherman; Load Data?

Bart B. · May 7, 2013, 12:21 PM

I've a request from someone with load development software.

The .300 Sherman is a wildcat based on a blown out .270 Win. case that's vitrually the same as a .30-06 Ackley Improved round. The difference is its body is 2.150" head to shoulder compared to the Ackley's 2.017" as shown in the Ackley's drawing below.

The Sherman case capactiy's about 74 grains of water.

Most interested in the estimated peak pressure and powder charge needed to shoot a 190 Sierra out the muzzle of a 28" barrel at 3000 fps.

Thanks in advance for your help.

Jimro · May 7, 2013, 09:33 PM

I don't have Quickload, but it seems very similar in case capacity to the 300 Hawk cartridge (basically a necked down 9.3x62 which has 77gr water capacity as a parent cartridge). The 300 Hawk is advertised to get 2801 fps from a 22" barrel using IMR 4350 under a 200 gr bullet. I don't have the charge weights for the Hawk cartridges, but the load data for that is cheaper than quickload.

Sorry this isn't load data, just another place to start looking for answers.

Jimro

May 7, 2013, 12:21 PM	#1
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	.300 Sherman; Load Data? I've a request from someone with load development software. The .300 Sherman is a wildcat based on a blown out .270 Win. case that's vitrually the same as a .30-06 Ackley Improved round. The difference is its body is 2.150" head to shoulder compared to the Ackley's 2.017" as shown in the Ackley's drawing below. The Sherman case capactiy's about 74 grains of water. Most interested in the estimated peak pressure and powder charge needed to shoot a 190 Sierra out the muzzle of a 28" barrel at 3000 fps. Thanks in advance for your help. Last edited by Bart B.; May 7, 2013 at 12:27 PM.

May 7, 2013, 09:33 PM	#2
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	I don't have Quickload, but it seems very similar in case capacity to the 300 Hawk cartridge (basically a necked down 9.3x62 which has 77gr water capacity as a parent cartridge). The 300 Hawk is advertised to get 2801 fps from a 22" barrel using IMR 4350 under a 200 gr bullet. I don't have the charge weights for the Hawk cartridges, but the load data for that is cheaper than quickload. Sorry this isn't load data, just another place to start looking for answers. Jimro __________________ Machine guns are awesome until you have to carry one.