To get back to the very quick question my personal answer is shoot what you find available. In another post I read you mentioned a vet bring back K98 correct? You'll be just fine. I will admit the Turk ammo is "hot" meaning that either poor storage or the fact thats its only pushing a 147 grain bullet make it feel hot.
I have probably fired more 8mm ammo than any other ammo....barring 9mm...and have never once had an issue. I would avoid Turk in a semi auto action but have never been shy feeding it to any of my mauser actions. A three lug system with a gas vent.....about as safe as any of these surplus rifles. Every rifle poses a risk, the K98 is not free of risk, just very low in my opinion.
As a previous poster went into the .318 vs .323 discussion I would say that as you are a .323 (assumption from other post) I personally would not fret about diameter sizes.
Get a set of loading dies if thats your thing and load your own. I often times will shoot "pansy" loads as its just more comfortable.
The bigger issue in my opinion is you said you "do not want to damage your gun". Then I would leave with saying shoot only non corrosive ammo. Unless you are familiar with cleaning up after corrosive ammo.......corrosive ammo would do more damage than a full powered load