I've learned that original Garands, with the original primitive gas port, used to be very sensitive to barrel pressure peaks and that modern ammos, especially heavy bullets and slow bruning powders, may not be suitable for those rifles.
After some researches about that on the web and among the Reloading 101 community, I developed a load that suits my garand very good. At least I fired 60 shots of those no jamming nor any problem but VERY hot brass (which is apparently usual to Garands)
My load pushes a 150 grains Barnes TSX bullet with a 48.8 grains load of Vithavuori N140, winchester brass and CCI LR primer, no crimping. Muzzle speed is 2782 fps. COL is 81 mm, it was a very important factor in the resolution of my early jamming problems.
Don't use those datas without appropriate precautions and reloading safety processes. It may not suit every Garand.
Last edited by grand_veneur; 11/18/15.
