Holy cow is what this was called on surplusrifleforum
I did get info from the seller here is what he had to say
" Hello Guy
Yepper, know exactly what happened. One of our customers came in with it. He was shooting reloads in it by someone else and unsure of what they were loaded with. He had fired several and all was ok. Then on that one bang it came apart. It bruised his hand as he was on one knee shooting and had his hand where it busted. Other than that he just had to change his shorts so to speak. Now whether it was the wrong powder, double charged or what dont know as the ammo was given to him. Upon further reading about them the receivers were kinda weak on them and not recommended to shoot any type of reloads or hot ammo, But that is the story on it and the shooter he is fine and betcha that he does not shoot anything but factory ammo now."
It went bang for sure. Has a case stuck in the chamber i did get the bolt out. barrel looks ok I just need to get the case out.
The best local surplus shop in the area warned me not to buy one of their nice FR-7's as they personally agreed the small-ring mauser was not worth the risk of shooting 7.62x51 and definitely not .308. That was, what, 15 years ago and that was how I went home with an ugly(er) FR-8, chipped grip swell and all...
The pic was removed, but there was a article on FR7's a long time ago.
The problem was not the ammunition but rather the conversion to .308.
The method used was certainly odd. The rifle was not rechambered, but rather the original chamber was bored out and a .308 chambered sleeve was installed.
This resulted in gas cutting at the front of the sleeve where the barrel was quite thin, eventualy ending in failure.
Now the original ammunition used in these rifles was NOT nato spec but raher a down loaded round.
The FR8 doesn't have that problem