M1 Garand spent cases, an observation
1I’ve had some minor tweaks I’ve made to the M1 Garand, nothing major just correcting minor annoyances. The gas plug kept loosening up during range trips. At first it would cause the sight to wobble and by the end of shooting would be visibly crooked. Fixed by preening the splines, a procedure described in a M1 Garand maintenance manual. The plug continued to loosen during range trips, so I decided to switch to a ported gas plug and see if that had any effect. It did. Last trip the plug did not loosen and additionally the spent brass was less damaged. The two pictures show a more dimpled set which was prior to the switch and the less damaged cases are from the last outing with a ported gas plug. The ammo in both cases was the PPU 150gr for the M1 Garand.