Brocock/BRK Ghost collaborative data request
- Thread starter cavedweller
- Start date
@PowderBurnt = Well the HP, as a .177 may or may not have come with the white spring, dunno.
The only way to be sure is ask AOA and or put a micrometer on it.
Did yours come as a .177 HP or?
thanks again.
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I bought mine in HP in .177. I have the spring kit but haven't changed the spring in the Ghost. I have changed the spring in my Atomic.
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I would imagine it's the white spring as the biggest changes in that caliber on the power wheel only come when the reg is bumped up to 115 ish. Results may vary.
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I put the blue spring in and had to lower to pressure to about 90 bar to get the JSB 10.34 pellets to shoot at 900 fps. The wheel didn't do jack, so OP is probably right that the reg pressure has to be higher for it to be useful.
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yep for blue spring Start at 115 regulator pressure, and shoot 3 dif pellet weights starting from 0 pwr to max. Only increase pressure by 5 psi if you don’t see changes of 5-10 fps. If you keep increasing regulator pressure at some point the same shot string will oddly drop off. 
Also make sure your hammer/spring adjustment hasn’t worked loose… mine did this causing additional craziness. Once reset it was easy peasy.
I achieved great results with the FAC White spring in both 17” and 23” barrels at 115/120 psi on regulator for 10.3, 13.4 and 16.1’s. All with a single tune using only the pwr wheel.
I was after accuracy not power so 910 FPS was my max desired speed from any Diablo pellet.
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Hi Cavedweller, when you say to check hammer/spring adjustment hasn’t worked loose, is that the set screw on the power wheel knob?
Also make sure your hammer/spring adjustment hasn’t worked loose… mine did this causing additional craziness. Once reset it was easy peasy.
I achieved great results with the FAC White spring in both 17” and 23” barrels at 115/120 psi on regulator for 10.3, 13.4 and 16.1’s. All with a single tune using only the pwr wheel.
I was after accuracy not power so 910 FPS was my max desired speed from any Diablo pellet.
thanks mike
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Thanks, I took advantage of the ghost sale at AoA and picked up a 22 plus, I went over it to make sure all bolts were tight. very well built. my first PcP. can you recommend a decent scope for it ? my old eyes need good glass. I won't be shooting past 60 yards just plinking and pests, good glass around $500. Thank you for any info. Mike
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Has anyone taken off the scope rail to lower their scope? I had a pretty big spread on my closer targets at a field target shoot and would like to get the scope closer to the barrel. Can you still get a full sight picture through the scope?
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it's pretty hard to get a good eyebox on the ghost or most bullpups with them lower - i tried and went back to the rail. That said, use the lowest rings possible and try to zero at the absolute apex to help you out... what scope are you using?
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Pulled the 18" barrel on the .20 Ghost this evening and dropped in a factory 23" .22 barrel. (Goal was testing of some 23grain .22 pellets).
Only change was the barrel.
To recap from my earlier post here....
18.9s at 910-915fps on MAX (35fpe)
Cross section (0.20 versus 0.217) and a difference of about 5 inches worth of barrel.
Only change was the barrel.
To recap from my earlier post here....
18.9s at 910-915fps on MAX (35fpe)
- Extended pin probe
- 455grain hammer (skeletonized)
- Preload adjustment about 1/8” proud of hammer body (threaded insert in nose of hammer on the earliest Ghosts)
- 0.051” wire hammer spring
- Regulator @ 122-124 bar
Cross section (0.20 versus 0.217) and a difference of about 5 inches worth of barrel.
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tested both the blue and white spring.
The white (LP) spring with reg at 80-90bar will get you about 750 fps with 13gr on min up to 825fps on max.
The blue one about 800 fps around 70bar
but
there wasn't much in the way of fps adjustment from the power wheel.
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