I am building up a Garand, 30-06, to shoot the 208 A-max and slow powders. Krieger is doing the barrel and I will be using a McCann gas system. My question is this: Does anyone know how big the gas port is for the 30-06 based rifles? We are going to install the next to lowest orifice size for the McCann and open the hole up in the barrel until the gun will cycle. This should give me some leeway to use 190's and try different powders.
After this, if it works out, a 280 version will be on the menu.
After this, if it works out, a 280 version will be on the menu.