I bought a case of Turkish and a case of Polish (years ago) and both worked great. Came in sealed crates. The easiest way to clean after shooting corrosive is to wet down a patch with windex and run it through and wipe off the bolt head. It will neutralize the corrosive proporeties and then clean as usual.
Biggest problem with the Turkish ammo is case splitting along the neck. Check every round closely.
"You say the Devil made do it with a smile. Raisin' hell and howlin at the moon. Well I'm gonna put your @$$ back in line. I'm gonna scare the Devil out of you."
BlackBerry Smoke Song http://www.youtube.com/watch?v=R513dA4peMg
Nothing is "proof" against a truly talented fool.