Anyone shooting 300 MP in 44 magnum and 357 magnum

[bluejay75]

Greetings Brothers,

Anyone shooting 300 MP in 44 magnum and 357 magnum. I have about 5 pounds that I need to burn up with no data to get going with. Anything helps.

Bluejay

[tja6435]

I’ve had to go over max loads from Alliant in the quest to get the cases to seal. It really shines in my 77/357 with 166gr boolits

[onelight]

I am still in the process of working up loads so don’t have any to share yet I have used it in 327,357 and 44 300mp will replace 296 for my full power loads here is a write up I found helpful.
http://ps-2.kev009.com/ohlandl/310/357-44_Bain_Davis/Handloader_274_Oct_2011.pdf

[kenton]

I don't know if you looked a Alliant's website.

http://www.alliantpowder.com/reloaders/Powder.aspx?powderid=29

[dbarry1]

I love 300-MP for the magnum handguns. The page kenton shared will get you started. In my experience, you cannot overcharge a magnum with 300MP. Be careful with undercharging.

[Silvercreek Farmer]

I worked up to Alliants jacketed data with cast in 44 and 357. No pressure signs other than flattened primers. Don't think I'd enjoy burning up 5 lbs!

[John Boy]

Alliant 300-MP is producing excellent groups with 32-40 & 38-55 lead bullets, 14.x & 16.x grs respectively