N/A Does fill pressure determine sweet spot velocity?

[LancasterAirgunner24]

i just did a handful of strings at 3000psi and every increase in hammer spring isnt flattening the curve. im getting over 1000fps currently and the ES is barely coming down. im not trying to shoot that hot, i am curious at this point and want to see where it goes but when i fill it to 2000 psi for example i can make a couple adjustments and its shooting good at 900fps. the lower the fill pressure the lower the sweet spot seems to be.. im trying to shoot 800-900 at 3000psi so my dwell time is faster, faster valve close.. am i retarded or what is going on here? unregulated pcp obviously..

 

[stateofmisery]

I think you have answered your own question, that is how unregulated pcp's work. I have a 2240 pcp that has a sweet spot of 2600 psi . I get a couple of good shots before it falls off the cliff. I am wanting a stronger hammer spring to open my valve at 3000 psi so I can get a couple more shots before it falls off the cliff and poa suffers from it. Mark

 

[Motorhead]

It is a balance found when the Pressure and hammer strike energy are working together making the speed wanted. Not one or the other, but Both.

Search Tuning on the Bell Curve. Unregulated and Regulated will have differing miens in achieving this balance.

 

[Vetmx]

Once you get your best setting and know your fill and refill pressures, there is still a spot on the curve where the gun is performing at its absolute best. So there’s no need to ride the short bus. Keep experimenting and taking notes, you’ll see patterns and eventually understanding.

 

[gendoc]

dealing with 3k psi Korean cliff guns for years, i found my best consistent accuracy at 2700-2600psi when hunting.
so, like what the guys have said......you gotta play with it to find that sweet spot