I need to replace the firing pin spring in one of my Sportco Clubman rifles. It just doesn't strike hard enough any more. Obviously I am about 50 years too late to get a brand new factory one.
How do you work out the specifications of a spring? I would guess coil diameter, wire thickness are a given, but length and "strength" are not really known factors.
Also where would I buy a spring from, if I work out the specifications?
The spring fits fairly closely into a lengthways hole in the firing pin, could I use a small piece of brass rod placed in after the spring but before the retaining pin to increase the compression on the spring?