Ghost Recommended reg pressures for different calibers

[Corvid_Hunter]

Has anyone seen any recommended reg pressures and FPS for the different calibers and configurations as a starting point for tuning?

 

[Luis Leon]

@Franklink, here or on AGN is your man. He been using a Ghost for over a year. He’s used multiple calibers and tunes… Reach out to him, or simply look up his posts on the Ghost XR.

 

[Franklink]

I've not seen anything official from Daystate/BRK that would constitute starting points for Ghost settings.

And I suspect the reason why is because there are so many variables. As an example, 22 pellets can go from 13.43 all the way up to 34grains, and that's just the good stuff. Start throwing in lead free and funky obscure pellets and the weight range goes even higher and lower. That's a VERY broad range of power output, and therefore settings.

And then there's barrel length, and what wire diameter spring is in the gun. On too of that, the same settings that produce 19fpe with .177/13.43 aren't likely to produce exactly 19fpe with .22/13.34. Even thought the pellets are nearly the same weight, the barrel porting is different, as are the physics of pushing a larger cross section (caliber) pellet.

"Tuning" a Ghost for desired fps of desired projectile isn't as complicated as the above sounds, just need a chronograph.

Furthermore, the same fps/projectile combination can usually be obtained in multiple ways with the Ghost.

 

[Franklink]

Just an example.....

For a .22/18 from a Ghost Plus, a reg pressure of 110-130 is likely going to be about right for the typical 880-920fps range that's appropriate for that pellet.

But that same .22/18 with reg pressure of 110-130 from a Ghost HP is likely going to be too fast for that pellet. The HP is going to have the heavier 0.051" hammer spring, and 6 more inches of barrel than the Plus.

 

[Corvid_Hunter]

Just an example.....

For a .22/18 from a Ghost Plus, a reg pressure of 110-130 is likely going to be about right for the typical 880-920fps range that's appropriate for that pellet.

But that same .22/18 with reg pressure of 110-130 from a Ghost HP is likely going to be too fast for that pellet. The HP is going to have the heavier 0.051" hammer spring, and 6 more inches of barrel than the Plus.

I'm lazy Frank. Hence the question. I realize there are a few roads to get to the same place, but I want the most air efficient one. With my Impact MKII I could get 900fps+ with the 25cal at a reg setting of about 110bar. From the little tuning I have done so far, I think I'm going to need about 150 bar to get a fully usable range out of the red hammer spring. At the 135bar (or so) that I'm at I tried, the velocity increase peters out about mid way through the power wheel. At that it was still around 930fps from #10 to Max. It might have hit that 930fps range sooner, but I was just jumping up in increments of 5 as I didn't have much time. That was with the 33gr JSBs.

 

[Franklink]

I'm lazy Frank. Hence the question. I realize there are a few roads to get to the same place, but I want the most air efficient one. With my Impact MKII I could get 900fps+ with the 25cal at a reg setting of about 110bar. From the little tuning I have done so far, I think I'm going to need about 150 bar to get a fully usable range out of the red hammer spring. At the 135bar (or so) that I'm at I tried, the velocity increase peters out about mid way through the power wheel. At that it was still around 930fps from #10 to Max. It might have hit that 930fps range sooner, but I was just jumping up in increments of 5 as I didn't have much time. That was with the 33gr JSBs.

Ghost HP in .22?

Maybe this will help....

I've been playing with a Ghost HP in .22 for a couple months. Came with a factory reg pressure of 165bar and the 0.051-0.052" wire spring. (I forget the color right now but maybe green?)

With that spring and that reg pressure it was capable of pushing the 28.5gr. Grands to 985fps at MAX hammer soring. Better accuracy was around 960-965 with the wheel on "16." I recently dropped the reg pressure to 150bar and can get the same 960-965 with Grands, but using "MAX" hammer tension.

I kind of consider 50-60fpe in .22 (ie .22/25.4 or .22/28.55 at their best speeds) and EFFICIENCY as mutually exclusive. From a Ghost with a 480cc bottle, realistic expectations for a. 22 at 50ish fpe is max of 45-50shots per fill. Bump to 60fpe and now you're looking at maybe 35-40 shots per fill being pretty good, any maybe 30-35 being .ore realistic.

 

[PasadenaMike]

Edgun L2 one knob. I play the one string guitar very well. Add more strings and

 

[Luis Leon]

Edgun L2 one knob. I play the one string guitar very well. Add more strings and

Come on Mike, how does the L2 come into da mix? Manzanas y chinas… Apples to apples, papacito…

 

[PasadenaMike]

Come on Mike, how does the L2 come into da mix? Manzanas y chinas… Apples to apples, papacito…

Don’t know lol. Just ignore it. I was delirious last night :;

 

[Danman]

I started the tuning process of my beast .22 tonight finally. I dropped reg to 100Bar (came set to 165B), and set up my chrono as light faded (needed for the chrono) I had the 13.4, 18.13, 20.83, and 25.39gr to try. I shot everything out of it to only 40Y as I was more worried about speeds than accuracy, but she was making pretty small groups down range, except the too-light 13.4gr pellets. This is where it got a bit wierd....Originally 18.13 on min gave me 998fps...just too fast as accuracy was crud. Dropping Reg a whopping 65Bar gave me still 945fps on min!?, but decently accurate. The 25.39 netted me 850fps on H.W. 15....not fast enough, but decently accurate. Here's the kicker....I mostly lost my 100fps speed change on the wheel with that tune. So I turned it up to 125Bar and refilled. The 18gr were doing 1040fps on minimum...what?!?!?! You could hear they were clipping! But a Reg of 165B gave me 998 on min. before?! Clearly if you own a and want to tune for lower power a spring kit is needed to get the best results. I am guessing I will be settling on around 145-150Bar, for the stock spring...but alas I ran out of daylight....to be continued! Absolutely loving my new Huma gauges.