Can't elaborate enough right now but if you own - or are in line for one of our semi auto FG42's then you already know that shooting mil surplus or reloads voids the warranty with respect to any ammo related damage done to the rifle but this is a little more specific.
DO NOT shoot Turkish ammo in this rifle unless you wish to cause serious damage/destruction to the rifle and/or yourself. From everything I have recently gathered off the net it is fine in bolt guns but specifically NOT for semi autos. This seems to be due to the slower burning powder they used to develop the higher muzzle velocities they wanted. This is great in bolt guns but plays absolute hell with higher port pressures in semi autos. I have a LONG list of references and a simple Google search will find you plenty as well.
And yes I know some of you either have - or know someone that has fired half a million rounds out of a such and such semi auto without issue but is is a very big "Hell No" in our rifle! Feedback welcome as always - and more info forthcoming as is possible.