PRod Trigger Group on 13XX or 22XX

[mobilehomer]

Instead of all the separate hammer parts, just order the assembly - CH2009‐110.
The PA also can be ordered as an assembly - CH2009‐120.

[proz83]

Hello, excuse my english !! did as on my picture (surrounded in green) no need to press the trigger even with the hollow hammer:

[DevilsLuck]

This is a great thread. Looks like I need to tinker with my 1377...

[rsterne]

That should work, I have thought of it before.... The only drawback is that the hammer must be withdrawn further to cock because of the sear sliding back.... This is only a problem if you are trying to achieve (or maintain) greater hammer travel, of course....

Bob

[proz83]

OK, thanks !! I do not want to lighten my hammer too much! I can just make a hack down the hammer! it's possible?

[rsterne]

You can grind away part of a hammer to lighten it.... but unless you remove quite a large amount of metal you will not notice any significant difference....

Bob

[proz83]

ok thank you very much bob!  in fact I have a discovery with prod trigger group and prod hammer with bnm breech! I have MAGNUM VALVE for DISCOVERY! can you tell me if I put an ultra-light spring valve, it will work! or I have to lighten the hammer ,,,? I filled my disco with 2900 psi! There are custom valve screws on it !!

my question is: if I put an ultralight spring valve, I have to lighten the hammer? 

[rsterne]

A lighter valve spring will make very little difference, most of the closing force on the poppet comes from air pressure, not the spring.... but you may have to reduce the hammer strike slightly to keep the same velocity.... Using a lighter valve spring in unregulated PCPs usually shortens up the usable pressure range for a given ES, so you may lose some shot count.... In regulated PCPs, you only need enough valve spring to seal the valve for your initial fill from empty....

Bob

[proz83]

ok I understand ! thank you bob

[proz83]

one more thing ! if I reduce the hammer to lighten it by keeping the spring oem of the valve! I will not lose fps?

what are the best settings for a discovery and custom valve, 3000psi and power adjust and prod trigger group, prod hammer?

[rsterne]

Yes, lightening the hammer with no other changes will lose velocity.... Usually a turn more preload on the hammer spring will gain it back again.... There is no such thing as "best settings", that depends entirely on your goal, and the pellet weight used.... If you are going to use 3000 psi instead of 2000, you will likely need a heavier hammer, not lighter, and will probably need a much stronger hammer spring as well.... If the ports in the custom valve are large, then most likely you will need even more hammer strike to open it.... If you go far enough, the gun will become nearly impossible to cock....

There is a definite relationship between the FPE output of the gun and the hammer strike needed to produce that.... Unless you use a balanced valve design, more power means the gun will be harder to cock.... and in fact that can become the limiting factor on FPE and caliber for any PCP design....

Bob

[proz83]

thank you bob for your information! I will try