What kind of ammo are you using? I've had bad luck with the clips that come with the CMP Greek ammo. It seems that the parkerizing on the clips is very coarse, almost like 320 grit sandpaper. The clips aren't able to move freely up and down and inhibit the functioning of the action. Even with the parkerizing smoothed out, the clips don't seem to function 100%. I now take the rounds out of the clips, throw the clips away, and load the ammo in U.S. clips.
For Garand information, the M1 Garand forum on jouster.com is the best place I have found. Lots of very knowledgeable people there.

http://www.jouster.com/

Tom