I can echo the Interarms “iffy at best” comments on the Stainless PPKs, mine and several other officers were not reliable enough for duty or backup use, my PPK, however, worked just fine. Through the years I would require each officer who wished to carry a PPKs or PPK fire several courses to test the functioning of that pistol before approval. Also, the officer was required to shoot the courses with ammo that was to be carried in the pistol and that ammo recorded with the firearm information. Many of the Walther pistols preferred ball ammo for reliable functioning, most would function with Silvertip.