Is speed a significant factor in reliable ignition? I'm still having regular issues with lighting off primers in my striker fired PPSh and I dont see what else this could be. My CZ52 has an itty bitty hammer and it does just fine, so all I can imagine at this point is that this rifle isn't striking primers swiftly enough. This rifle uses a spring and a large steel block, which are hitting the bolt mighty hard but not consistently lighting off primers. The block is rather heavy, and I dont think the mass is necessary to poke a dent in a primer.