"Ammunition for the M-1 Garand
Don't buy "off the shelf" commercial .30-'06 loads without first making sure they are appropriate for a M-1 Garand.
The Garand was designed to use loads with bullets weighing from 150 to 180 grains and propellants with an “intermediate” burn rate. You need to use the correct type of powder, and to a lesser extent bullet weight, to maintain the proper gas port pressures. If the pressure curve isn't right, the rifle can be damaged. When in doubt, stick to US or Greek mil-surp ball loads. If you reload there is lots of Garand specific load data available."
Where do you get the adjustable gas plug from?