I recently got a new Krasnogorsk-3 and want to test it before I invest in actual film to shoot with it, but I'm facing a strange issue:
In order to practice loading it, I bought some white leader film based on Acetate (and was assured by the vendor it won't harm the camera in any way).
Loading works perfectly fine at the start (I have a camera without loop formers, so do it manually), I form the upper loop, go past the gate and reinstall the pressure plate, then the problem starts. I can finish the bottom loop and all, but whenever the pressure plate is installed, no film will move, it gets completely stuck. As soon as I lift the pressure plate a bit, or remove it, the film advances fine onto the take up reel, but of course this is not useful to me.
Could it be that this leader is somewhat thicker or less flexible than normal negative film would be? Should I just try to find some very cheap expired film on Ebay and continue with that one? I just need a few feet of fogged film to test. Or is this all a sign of the K-3 not working correctly?