I bought an Interarms stainless, PPKS in the mid-80's. It was my CCW for a lot of years. I never had any issues with it. It has been reliable with everything I've ever put through it. By comparison, a friend bought a blued PPK at the same time and had feeding problems from the get-go..........go figure
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I use a Kel-Tec, P3AT more now due to the light weight and ease of pocket carry. But, the PPKS still goes with me when I work out on my Mtn Bike ..ie..sweating profusely
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Don