If you don't have M2 / military load, you can install an adjustable gas plug and shoot any load. I'm pretty sure you can find them through Brownells or some other outfit for less than $30.
Stay away from the corrosive primer loads though.
Edited by TXBoss (09/27/17 09:02 PM)
"Good judgment comes from experience, and a lot of that comes from bad judgment..." - W. Rogers