Ouch!
Garands are tough,I had that happen with greek ammo
nearly shat myself!!(piddled a bit though!)
Had it checked out by a reputable smith who was a Garand armorer back in the day-headspace was ok,receiver was fine,op rod was tweaked up a bit-replaced that ,and the stock cracked,sadly it was a nice cartouched one but i found a replacement at Numrich arms for a decent price that was nicer
The sad part was i just bought the greek ammo,after that i gave the ammo to a freind who pulled the bullets,kept the powder and trashed the cases-he said they were out of spec,skinny in spots were others were thicker
I vowed never to get greek ammo again-oh and they were dated 58
Im glad nobody got hurt,stocks can be replaced,faces are kinda harder to fix