Regulator pressure vs hammer spring tension for accuracy

[mubhaur]

Hello dear all,

I need your input for obtaining extreme accuracy from a pcp in which we can only adjust regulator pressure or hammer spring tension or both.

I have read that normally the regulator becomes very consistent at near its maximum pressure limit. On the other hand I have read that for extreme accuracy one should keep the regulator pressure to the lowest side to obtain a certain fps.

Both these things look opposite to each other. 

I have myself witnessed in some guns that at high regulator pressure the initial hit of air to the pellet is phenomenal and may cause it to skid resulting in fouling of barrel too quickly or otherwise deterioration of accuracy. 

Here I don't talk of efficiency at all. All my focus is on accuracy even at the cost of efficiency. 

What do you gentlemen understand about the combination of regulator pressure and hammer spring tension? 

I feel that low regulator pressure allows the pellet a long and continuous thrust of air up to the muzzle and the pellet accelerates gradually. 

I wish that all those members who are in the know share their point of view. 

All other factors will be kept constant. 

Regards, 

Umair Bhaur 

 

[John "spysir" Blount]

Interesting way of looking at it ( your ? ) .

Generally you do need the fps that works best with your pellet/barrel combo.
"I" would want the reg set as low as possible to achieve this, and, I would also want the lightest striker spring and lightest striker that will produce said fps as less spring and less weight on striker/hammer the less movement.
Tuned this way it , should, be very efficient , have a sharp crack and have the least movement.
John 

 

[ackuric]

+1...

I reduced my poppet in a .25 cal down to .25" which allowed me to run a 25 gram hammer and still generate 60 FPE @ 2000 psi if I desire, although I keep it tuned anywhere between 20-55 FPE @ 1900 psi.

With a 42 gram hammer I can generate 50 FPE with a 8 lb hammer spring, but I prefer the lighter hammer and run a 11.5 lb spring to generate 50 fpe.