Brocock/BRK Ghost collaborative data request

[Solo1]

@Solo1 - is this for a .22 cal ? Pellet speeds at what power wheel settings?. Thanks!

Yea 22 going from min to max

 

[Franklink]

As requested...

My Ghost .20 tune has changed a bit since post #8.

I run the NSA .20/18.9s at 910-920fps.
Produced by an 18 (or maybe 19?) inch barrel.
Reg pressure of 126-128bar
Standard hammer
0.052" wire diameter spring
Power wheel on max.

Same as above pushes the JSB .20/15.89 at the same 910-920fps speeds, but with hammer tension @ "6."

Rudy, if I remember correctly, your .20 barrel is closer to full length, I want to say 22-23inches. So yours will make power better than my slightly shorter barrel.

If you're going to experiment with your .20 barrel and the NSA slugs, I'd recommend you shoot them somewhere between 880-930fps. They are accurate slower, but the BC increases with speed with these particular slugs, seeming to top out around 930fps.
You should see:
BC around 0.085 with speeds down around 860-870.
BC around 0.09-0.095 with speeds in the 880-890 range
BC around 0.1 with speeds up around 910-920.

 

[cavedweller]

As requested...

My Ghost .20 tune has changed a bit since post #8.

I run the NSA .20/18.9s at 910-920fps.
Produced by an 18 (or maybe 19?) inch barrel.
Reg pressure of 126-128bar
Standard hammer
0.052" wire diameter spring
Power wheel on max.

Same as above pushes the JSB .20/15.89 at the same 910-920fps speeds, but with hammer tension @ "6."

Rudy, if I remember correctly, your .20 barrel is closer to full length, I want to say 22-23inches. So yours will make power better than my slightly shorter barrel.

If you're going to experiment with your .20 barrel and the NSA slugs, I'd recommend you shoot them somewhere between 880-930fps. They are accurate slower, but the BC increases with speed with these particular slugs, seeming to top out around 930fps.
You should see:
BC around 0.085 with speeds down around 860-870.
BC around 0.09-0.095 with speeds in the 880-890 range
BC around 0.1 with speeds up around 910-920.

Thanks - super helpful - i'll fiddle with the ghost when i get back from the NC grand prix in Burlington this week.
I really would like to publish some kind of a tuning guide for the Ghost, and the Blackwolf, data matters and it certainly saves time and lead.

 

[MikeAndrews]

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

Hey old goat take a look at athlon Midas Tac scopes, they are excellent for the money.

 

[MikeAndrews]

Maybe Pm him rather than muddy the thread

Sorry didn’t realize that I was out of bounds.

 

[cavedweller]

I'll use this for FT in July. I just don't want their chronograph to say I'm at 21 pounds. That'd suck.

Your pellets weigh 13.4 ? You said 13.7?

 

[cavedweller]

Sorry didn’t realize that I was out of bounds.

It’s fine, I was having a moment

 

[PowderBurnt]

Your pellets weigh 13.4 ? You said 13.7?

13.7 by AEA.