My match load:
Greek Surplus HPX Brass
168 grain Nosler Custom Competion HPBT
CCI 34 primer
47 grains Varget
This is a very accurate load for my rifle. Its also comfortable to shoot, but you lose some velocity. Mine Should be at 2750-2800 fps. I've shot 12 10's with 8 X's at 100 meters in my slow-fire prone (20 shots) with this load.
A bunch of info all in once place here: http://www.guns.com/2011/08/16/the-secre...-garand-part-i/
Basically, it boils down to powder burn rate. Too fast: bent opt-rod. Too slow: doesn't cycle. Pressure is important, but not as much as the power burn rate.
PPU/Prvi Partisan, Hornady, and a couple others load a Garand load.