Air Gun Home :: View topic - Question about Boss Max-Flow Valve

rsterne · Moderator

I recently purchased a B & A Boss Max-Flow Valve to try in my Discovery.... I have drilled and tapped mounting holes as in the Disco valve.... but one thing I noticed is that the valve stem protrudes further back in the gun, reducing the hammer fall distance by about 1/16".... This is because the valve interior is machined that much deeper to increase valve volume.... Shocked

I checked a stock 22XX valve, and the valve stem is in the same location as in the Disco valve, relative to the sear.... My question is, does anyone know for sure what effect reducing the hammer travel IN THE FORWARD DIRECTION has on the hammer strike, and hence the velocity potential?....

I have used a Dual Power Hammer, and I know that when you don't cock the hammer as far the velocity is much reduced.... but in that case you are storing less energy in the hammer spring.... By effectively lengthening the valve stem (it's not actually longer, but positioned closer to the sear), you haven't changed the potential energy stored in the hammer, but it has less distance to accelerate when released by the sear, so you would think it would have less momentum when it strikes the valve stem.... On the other hand, the hammer spring has more force remaining at the moment of strike.... Rolling Eyes

Anyone experiment with shortening the valve stem in a 22XX with or without the Boss Max-Flow valve?.... What were your results?.... Wink

Bob