Video

[Boyd Allen]

Although this video demonstrates how to do a clean job of shortening the main spring of an air rifle, I believe that the same method could be used on firing pin springs. At this point you might ask why in the world would I want to do that? The answer is that it would allow you to play with different amounts of cocked pressure (spring weight). This may be inconsequential for factory rifles, but for short range benchrest rifles the tuning of striker assemblies has been a hot topic for some time. By starting out with a spring that is too long, one could trim to any length desired. You may ask why this fellow's method is significant. My answer is that I believe that springs work better when their ends are flat and square, which is what this video demonstrates how to do. By shortening and adding weight between a firing pin's flange and the spring, different pin assembly weights can be achieved as well as cocked weights. I have not experimented much in this area, but I understand that others have, in some cases resulting in measurable improvement in accuracy. For those that wish to try this sort of modification, I believe that this video contains useful information.
https://www.youtube.com/watch?v=Dk2Sw1m3kCw

 

[adamsgt]

Very informative, thanks Boyd. This seems to be a process that could be applied to many situations where your're altering a springs length.