Large Rifle primer shortage?

[CINDERS]

I had a go of a 30 cal Mg at Cu-Chi tunnels also a Garand but it broke the firing pin after 6 rounds so did not get to hear the "Ping".
I then had to have 2 rounds out of the 30 Mg well that lasted a long time. LOL

[browningautorifle]

a Garand but it broke the firing pin after 6 rounds

That's VERY unusual. I suspect they had a local repair job or home made part that dumped on you. US made M1 rifle parts are just about indestructible.