Brocock/BRK Ghost collaborative data request

[PowderBurnt]

I've tried several pellets at different weights for my .30 caliber 600mm barrel. None are grouping well. Either my Athlon Heras 6-24x50 is garbage or it's something else.

 

[Solo1]

I've tried several pellets at different weights for my .30 caliber 600mm barrel. None are grouping well. Either my Athlon Heras 6-24x50 is garbage or it's something else.

Try polishing the barrel sometime its just the ticket

 

[pesty3782]

I've tried several pellets at different weights for my .30 caliber 600mm barrel. None are grouping well. Either my Athlon Heras 6-24x50 is garbage or it's something else.

I cleaned my barrel and did a light polish job on it. My reg is at 144 and wheel at 14....Mine loves the AEA 50.5 right at 900 FPS.

Tony P.

 

[PowderBurnt]

I cleaned my barrel and did a light polish job on it. My reg is at 144 and wheel at 14....Mine loves the AEA 50.5 right at 900 FPS.

Tony P.

I tried that pellet at that speed. It wouldn't group at all. I'm trying a different scope tomorrow.

 

[PowderBurnt]

Wasn't the scope. Guess I'll use my s510 for my next shoot.

 

[cavedweller]

I've tried several pellets at different weights for my .30 caliber 600mm barrel. None are grouping well. Either my Athlon Heras 6-24x50 is garbage or it's something else.

Almost never the scope... esp if a quality scope unless your mounting methods are fubar.

 

[cavedweller]

Here you go Rudy, Tried to be succinct, which is hard for me.

.177 barrel (17 inches, 12 land and groove, choked, 1:17.7)

10.34s at 890fps (accuracy from the 10.34s best if kept under 900 with this barrel, and really goes south at 920+)

• Flow through probe
• 455grain hammer (skeletonized)
• Preload adjustment about 1/8” proud of hammer body (threaded insert in nose of hammer on the earliest Ghosts)
• 0.047” wire hammer spring
• Regulator @ 105 bar
• Hammer spring tension at MAX

.20 barrel (18 inches, 12 land and groove, choked, 1:17.7)

(two “tunes” for this one, first is the target edition, second is the long range pester)

13.73s at 810fps on MIN

15.89s at 915fps on 11

18.9s at 870-880fps on MAX

• 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)
• 0.047” wire hammer spring
• Regulator @ 126-128 bar

Or…

15.89s at 920-925 on “5”

18.9s at 910-915fps on MAX

• 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

.22 barrel (23inches, 5 groove polygonal, choked, 1:30)

28.55s @ 960fps on MAX

• Extended pin probe
• 545grain hammer (non-adjustable preload with this hammer)
• 0.051” wire hammer spring
• Regulator at 150 bar
• Hammer spring tension on MAX

As time goes forward I KNOW some of you Ghostly owners have lots of data to share
hop on
Share your data
I would really like to produce a condensed / consolidated tuning cheat sheet for the ghost in a variety of calibers asap.

Also

Has anyone found some gauges for the Ghost, especially the regulator Gauge that are accurate and that we can SEE?

 

[PowderBurnt]

Almost never the scope... esp if a quality scope unless your mounting methods are fubar.

My eyes aren't great, but I'm sure I can see burrs at the end of the barrel. I'm gonna try polishing.

 

[Solo1]

My eyes aren't great, but I'm sure I can see burrs at the end of the barrel. I'm gonna try polishing.

Mine had a pretty tight choke push a pellet thrugh to check for tight spots and give them a little extra

 

[Solo1]

As time goes forward I KNOW some of you Ghostly owners have lots of data to share
hop on
Share your data
I would really like to produce a condensed / consolidated tuning cheat sheet for the ghost in a variety of calibers asap.

Also

Has anyone found some gauges for the Ghost, especially the regulator Gauge that are accurate and that we can SEE?

I like the big wika

 

[cavedweller]

@cavedweller,

Been considering a similar experiment, but with a slight shift down in pellet weight. Curious on a somewhat midweight .22 pellet weight "tune" using the 13.43/14.35/15.89/18.13/20.83s.

And mostly interested in how it'll behave with those pellets while using the same 105-110bar reg pressure that the gun needs for a 19fpe .177 "tune" for field target.

Been mentally planning on doing the above and sharing the results, but also comparing the impact points when going from the .177, .20, and .22 barrels.

Rudy, do you happen to have the wire diameter of the "white" spring you're using?

 

[cavedweller]

I tried that pellet at that speed. It wouldn't group at all. I'm trying a different scope tomorrow.

Did you resolve this problem? @PowderBurnt

 

[PowderBurnt]

Did you resolve this problem? @PowderBurnt

I'm working on it. I polished the barrel today. Tomorrow will be the test to see how it does. That is if the wind cooperates.

 

[keith1]

I’m trying to create a cheat sheet for the FAC Ghosts when wanting to change calibers or barrel length and or pellets efficiently.
I have ALL barrel(s) lengths and calibers, including a .20 available to me.
I want to hear from folks who have found the perfect combination of:

Regulator pressure used for that caliber and barrel length
hammer spring installed
Power wheel setting (s)
pellet type/weight
resulting speed fps.
you can include slugs if you like but be very specific as not that many slug shooters "yet".

Thanks in advance

And why didn’t BRK think to do this???
Surely someone has??

Cavedweller keith 1 here 1) getting my ghost soon from aoa need for hft you said my reg should be 110 for 19 foot pounds ? and what pellet 10.34 ot 13.4? thanks keith

 

[cavedweller]

Cavedweller keith 1 here 1) getting my ghost soon from aoa need for hft you said my reg should be 110 for 19 foot pounds ? and what pellet 10.34 ot 13.4? thanks keith

@keith1 it can push either weight at an HFT legal <20 fpe speed but you need a chronograph to make sure of the correct power wheel settings for your pellet choice.

 

[PowderBurnt]

In typical me fashion, I brought the wrong pellets with me to see how the gun is shooting. I was surprised to see a pellet that shot horrible before only shot bad now. I'll head back tomorrow to try again.

 

[PowderBurnt]

The .30 barrel still wouldn't group consistently, so I sent it back. It or a replacement won't be here until well after the shoot in Oregon. Typical.

 

[cavedweller]

The .30 barrel still wouldn't group consistently, so I sent it back. It or a replacement won't be here until well after the shoot in Oregon. Typical.

Did you check to make sure it wasn’t clipping?

 

[PowderBurnt]

Did you check to make sure it wasn’t clipping?

I checked everything I could think of. Even went to a gunsmith. I'll let AoA look at it. They said they'd never had a .30 with a bad barrel. Maybe they're right. We'll see.