Lets understand how an air rifle works in order people stop playing with the regulators.
In a rifle with hammer system there are two forces in fight, the preassure on the cilinder, bottle or plenum, and the force of the hammer (spring on tensión that is release with the trigger) to open the valve and release the air to move the pellet.
The higher the preassure in plenum, the less oppening of the valve, unless you increases the tensión of the spring of the hammer.
To be able to know what is the maximum power of your rifle you can remove the regulator, dial in all preassure (tensión of the spring) of the hammer and fill the rifle to 80 bar and shoot and measure fps, then to 90 and measure again, then to 100 and measure again. Eventually you will notice a decreases of fps, that mean that the top fps your rifle can give was the previous bar filling. At that preassure you should set your regulator and then decreases hammer tensión in order that you feel the rifle to shoot smoth.
Once you find that preassure the regulator should be set there and NOT MOVED. You will nor gain anything. The regulator will keep that exact optimal preassure for the air rifle to shoot at maximum power from top preassure allowed, to the regulated preassure set.
For example my Vulcan 3. 30 Cal gets to the top fps at 140 bar. If I increases preassure. Fps start decreasing.
The only rifles on which more preassure in regulator means more fps are the HUBEN, LCS and Rattler because those rifles do not have a hammer.
In other words once you get to know the adequate preassure your regulator has to be, you should not mess with it.
I took the following image from the thread of the Brocock Ghost. It confirms exactly what I explained above:
In a rifle with hammer system there are two forces in fight, the preassure on the cilinder, bottle or plenum, and the force of the hammer (spring on tensión that is release with the trigger) to open the valve and release the air to move the pellet.
The higher the preassure in plenum, the less oppening of the valve, unless you increases the tensión of the spring of the hammer.
To be able to know what is the maximum power of your rifle you can remove the regulator, dial in all preassure (tensión of the spring) of the hammer and fill the rifle to 80 bar and shoot and measure fps, then to 90 and measure again, then to 100 and measure again. Eventually you will notice a decreases of fps, that mean that the top fps your rifle can give was the previous bar filling. At that preassure you should set your regulator and then decreases hammer tensión in order that you feel the rifle to shoot smoth.
Once you find that preassure the regulator should be set there and NOT MOVED. You will nor gain anything. The regulator will keep that exact optimal preassure for the air rifle to shoot at maximum power from top preassure allowed, to the regulated preassure set.
For example my Vulcan 3. 30 Cal gets to the top fps at 140 bar. If I increases preassure. Fps start decreasing.
The only rifles on which more preassure in regulator means more fps are the HUBEN, LCS and Rattler because those rifles do not have a hammer.
In other words once you get to know the adequate preassure your regulator has to be, you should not mess with it.
I took the following image from the thread of the Brocock Ghost. It confirms exactly what I explained above:
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