Its good to know there are companies who make premium hunting ammo specifically for the M1 Garand action. For those who have no Schuster adjustable gas plug, this is the way to go.
http://www.underwoodammo.com/30-06springfieldm1garand168grainhornadya-maxboattailboxof20.aspx
http://www.underwoodammo.com/30-06springfieldm1garand168grainhornadya-maxboattailboxof20.aspx