458 Win Mag

waltherp88 · August 18, 2013, 07:35 PM

I have 350 gr. lead gas checked and 405 gr. lead non-gas checked bullets. I was hoping to use AA5744. I cannot find any specific load data for those two bullet weights. I would appreciate any help. Thank you, Eric

black mamba · August 19, 2013, 09:58 PM

I have some older data that shows the maximum charge of 5744 for a 350 gr cast bullet is 51 grains, and a 405 gr cast is 49 grains, both @ 3.00" COAL with Remington 9-1/2M primers. These loads will give 2000-2100 fps.

5744 powder is NOT position sensative, so you can go with very light load densities and still get good, consistent ignition, but I'd stay with magnum primers. Loads as low as 35 grains of powder will be accurate and give around 1500-1600 fps.

August 18, 2013, 07:35 PM	#1
waltherp88 Member Join Date: December 29, 2009 Posts: 18	458 Win Mag I have 350 gr. lead gas checked and 405 gr. lead non-gas checked bullets. I was hoping to use AA5744. I cannot find any specific load data for those two bullet weights. I would appreciate any help. Thank you, Eric

August 19, 2013, 09:58 PM	#2
black mamba Senior Member Join Date: September 13, 2011 Location: SW Florida Posts: 890	I have some older data that shows the maximum charge of 5744 for a 350 gr cast bullet is 51 grains, and a 405 gr cast is 49 grains, both @ 3.00" COAL with Remington 9-1/2M primers. These loads will give 2000-2100 fps. 5744 powder is NOT position sensative, so you can go with very light load densities and still get good, consistent ignition, but I'd stay with magnum primers. Loads as low as 35 grains of powder will be accurate and give around 1500-1600 fps.