As I posted on another thread a couple days ago, Turkish surplus isn't unsafe it just isn't the 7.92x57 most people think it is. Here is my sum up from that other thread.
"As mentioned I felt I would clarify the ammo a bit more. The idea that Turkish 8mm Mauser is overpressure and dangerous has been spread around by people who don't know what they are talking about and lack understanding as to what the round is.
The Turkish 8mm round is based off the WWI 7.92x57 round also called Patrone 'S' ('S' standing for Spitzer aka pointed in German). This round was a 154grn flat-based spitzer .323 bullet travelling at roughly 2880 ft/sec. The Turkish never updated to the later Patrone 's.S.' round which pretty much everyone else did (this being the 198grn boat-tail spitzer .323 bullet at roughly 2490 ft/sec).
Now what this means for civilian shooters is pretty much all semi-automatic 7.92x57 rifles (8mm Mauser) were chambered for the Patrone 's.S.' not Patrone 'S' which would generate a significantly different pressure cerve and potentially destroy semi-automatic firearms (and it has). This is what caused people to believe that Turkish 8mm is dangerous, simply because uneducated people used the wrong ammo in the firearm (think of it being the same as shooting Swiss 7.5x55 GP-11 ammo though a Swiss 1889 rifle in 7.5x53.5 GP-90, it generally will chamber, and it will explode as it wasn't designed for that type of pressure).
What this means is if you have a M98 action in good condition you should be fine. If it is a Turkish Mauser that is actually the ammo the sights would be regulated for (same thing for Gewehr 98s and the original Kar 98s). I personally wouldn't use it in a Commission 88/05 rifle even though it was done as they weren't the strongest rifle action to begin with (and there were documented cases of them blowing up in Turkish service as well as German service, I recommend reading up on the Commission 88 rifles and doing a ton of research as to what to shoot out of them if you intend to).
I hope this helps clarify the confusion that can be caused by this particular round. It is odd that it is difficult to find good solid information on 7.92x57 (8mm Mauser) despite the fact it is one of the most common rifle rounds for military surplus. "