Forgot to mention the doubling only happened 3-4 times, not during the same time period, i doubt if it was a bump fire but who knows
It happened over the space of 6 range sessions, it would happen once in a blue moon, never consistantly and would happen when it felt like it.
Edited to add: I forgot, I think the only time I had problems was with the original wooden stock, switched to a fibreforce and I dont think I have had a problem until now. And I am not the first owner, I think we got the sks 3-5 years ago, problems only occured the first year. If I remember right since the new stock we haven't had any doubles.
I am concerned since i saw how to take the trigger group apart, it stated that the hammer should stay cocked until you depress one of the safeties, and the hammer I have just bypasses the safeties. The hammer spring seems stiff enough, I had a hard time getting it off while it was clamped in a vice(surrounded by a cloth I might add), but I dont know anything about the other spring, not the magazine/sear spring, the problem only occurs when the sear is removed.