Found some .30-06 ammo in my friends place. It's on cloth belts, though I'm not 100% sure it if it came on the belts or he put them on the belts. The head stamp is in sort of a triangle, in this approximate angle; " F N 66" So the "F" is at noon, the "N" is at 4 'oclock and the "66" is at about 8'oclock. What I'm trying to identify is; a- who made this b- is it corrosive c- is this M2 ball or m2 ball spec ammo IF it is M2 ball spec, we wante dto shoot it out of a garand, but wewant to be careful that is is OK stuff to do so. I've searched everywhere and cannot find nay referance to this headstamp. I checked and it is NOT "FA", but is indeed "F N". Any helpy ou can offer is greatly appreciated!