Is there a way to tell when your hammer spring adjustment and reg pressure are in harmony? Some have said you can tell by the noise the gun makes???
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Tuning Reg setting and hammer spring tension
- Thread starter Tinbuster
- Start date
I read that and now I am really confused,,, In a nut shell I try and get the lowest Reg pressure and the least hammer spring tension to get my FPS where I want them.
I always like to K.I.S.S
Mike
I always like to K.I.S.S
Mike
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Whatever your regulator’s setpoint, finding the proper amount hammer strike is a simple matter of dialing up the hammer spring tension until the velocity no longer increases (the velocity plateau). Then dial it back until the velocity falls to somewhere between 95 - 97% of that maximum (the knee of the velocity curve).
For example, if the maximum achievable velocity is 940fps, you would want to adjust it to 893 - 912fps. In doing so, the gun will be at a favorable state of tune that is less sensitive to minor variations in hammer strike (e.g. due to friction) or pressure (e.g. regulator linearity, creep, etc.). That means a low extreme spread.
However if you're interested in really digging in, there are a number of more invasive things you can play with. Hammer weight, hammer stroke, hammer buffer, striker material, porting, valve spring tension, poppet material...to name a few. Any and all tricks that can be used to tune a conventional (unregulated) PCP for a long bell curve will be beneficial to the consistency of your regulated rifle. These things are often overlooked when tuning a regulated rifle because, well, in most cases you don't have to worry with them to obtain good results but they are nevertheless relevant if you're looking for the best consistency possible because no regulator is perfect and no system has 100% consistent hammer strike.
For example, if the maximum achievable velocity is 940fps, you would want to adjust it to 893 - 912fps. In doing so, the gun will be at a favorable state of tune that is less sensitive to minor variations in hammer strike (e.g. due to friction) or pressure (e.g. regulator linearity, creep, etc.). That means a low extreme spread.
However if you're interested in really digging in, there are a number of more invasive things you can play with. Hammer weight, hammer stroke, hammer buffer, striker material, porting, valve spring tension, poppet material...to name a few. Any and all tricks that can be used to tune a conventional (unregulated) PCP for a long bell curve will be beneficial to the consistency of your regulated rifle. These things are often overlooked when tuning a regulated rifle because, well, in most cases you don't have to worry with them to obtain good results but they are nevertheless relevant if you're looking for the best consistency possible because no regulator is perfect and no system has 100% consistent hammer strike.
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