svt 40 hammer spring

[olympia]

Can someone tell me where I can get an SVT 40 hammer spring, I want to change it in hopes of being able to fire more different brands of ammo, so far all it likes is russian. I want to experiment and see if changing the hammer spring and givnig it more force will ignite old/stiff primers that seem prevalent in PRC ammo

 

[sidester]

I Think the same way for igniting hard primers.
I would try a shim first with the spring to see if you can achieve this goal.
Then of course, a stonger spring.