Question, why would my bolt be stiff after firing a round. The symptom is the same for both barrels (.223 & 6mm br) on the same model 12 flat back action. Doesn't matter how hot or reduced the load is the amount of force required to lift the bolt is the same. When raising the bolt with no bullet inserted or removing unfired bullet force required to lift bolt is very low. Brass shows no sign of pressure what so ever, primers not flattened, cratered and no ejector marks. Head space per go, no/go gauges is perfect. Two entirely different bolt assemblies used with each barrel. I am stumped.