It's where I started after turning 1/8 - 1/4 turn out.Just curious, you cited reg pressure of 85 bar. Was that as low as the reg on you HP would go or just where you decided to start?
Thanks.
Upvote 0
It's where I started after turning 1/8 - 1/4 turn out.Just curious, you cited reg pressure of 85 bar. Was that as low as the reg on you HP would go or just where you decided to start?
Thanks.
Please share once they've arrived and you get em installed.The gauges are still in my basket at Huma.
Brocock recommended dialing the pressure down to 130 bar and exchanging the hammer spring from a medium strength. It's on the way!Well, subtracting the min from the max that you gave I'm seeing a 17fps spread. Which is just fine, especially considering that you have the Ghost HP and it has that heavier hammer and hammer spring in it. Play with one of the ballistic apps a bit and you'll see that a 17fps spread hardly effects the impact point at all, even out to 100 yards. The wind and pellet to pellet variation and the human factor are all bigger factors than that 17fps spread.
As for why hitting the valve harder (power wheel adjustments) isn't changing the fps much, the low reg is the limiting factor here. With that low of a reg it doesnt look like it matters how hard you hit it, you're going to be in the area of 915fps with 15.89gr hades.
Sounds like a pretty sweet tune to me. I think I'd be happy that your 50-65fpe HP can go down that low and be consistent and accurate.
Now if you're truly OCD, a lighter hammer spring might net you a more consistent extreme spread, all else the same. But play with Strelok or Shooter or Chairgun and see how little effect a 17fps spread has first. Also, swapping out the hammer spring is a few more steps than just dropping the reg pressure.
Yeah it's in the 15 pages somewhere.Brocock recommended dialing the pressure down to 130 bar and exchanging the hammer spring from a medium strength. It's on the way!
@Franklink - I can't remember if you had any photos on the disassembly to remove the spring. The owners manual schematics are not clear to me.
Thank you, Cole. Back when AoA received their initial batch of Ghosts, Jared measured a .22 HP barrel’s twist to answer my question. Not sure how exactly he accomplished it but he came back with 1:18”. That told me that they are probably LW poly 1:17.7” twists.@zx10wall, regarding the measuring of the twist rate in the .22 HP barrel, as requested.....
So, best guess of the twist rate for the .22 HP barrel on the review Ghost in my possession is a 1:36". (the 17 inch .177 barrel that came installed on the Ghost review gun is a very obviously/confidently measured, standard 1:17.7" 12 land and groove barrel
VERY nice Derrick! Had to swap out that trigger rod return spring to get the pull weight that low right? Are those fps results with the 34gr .25s? Or slugs? In addition to the projectile info, please keep us updated with results, your impressions, and generally anything you learn about the Ghost that you are willing to share. Yours being a .25, you'll have data for that caliber that I simply won't be able to provide to interested parties (myself being one of those interested parties, as I continue to consider making the switch to .25/34gr for my long range uses).Black Max is here ~ .25 Ghost HP. Trigger job done yielding a 4.5 ounce break and I did a bit of port/polish work in the barrel’s transfer port and probe.
At 150 bar reg setting, I’m getting 955 fps on max (19). Dial down to 14 for 940 fps. Down to 8 and I have 920 fps. Just got it scoped and will be testing as time permits. Love the feel, adjustability and power! Added a grip and moderator.
Looking good... Thats good power with the 34 grain King Heavy at 150 bar. Knowing you it won't be long before we see what 170 and/or 180 bar can do.  I found through my .25 RW HP that about 935 to 940 FPS worked best with the King Heavy, more than likely the barrel is the same. That scope is my favorite, the Athlon Midas BTR Gen2. Great looking gun. Can't wait to get mine. If it's as accurate as my .25 Red Wolf HP I'll be thrilled!!!Black Max is here ~ .25 Ghost HP. Trigger job done yielding a 4.5 ounce break and I did a bit of port/polish work in the barrel’s transfer port and probe.
At 150 bar reg setting, I’m getting 955 fps on max (19). Dial down to 14 for 940 fps. Down to 8 and I have 920 fps. Just got it scoped and will be testing as time permits. Love the feel, adjustability and power! Added a grip and moderator.
View attachment 317622
Yes, this is with JSB 33.95gr pellets. I’ll get some meaningful testing done Friday at 100 yards.VERY nice Derrick! Had to swap out that trigger rod return spring to get the pull weight that low right? Are those fps results with the 34gr .25s? Or slugs? In addition to the projectile info, please keep us updated with results, your impressions, and generally anything you learn about the Ghost that you are willing to share. Yours being a .25, you'll have data for that caliber that I simply won't be able to provide to interested parties (myself being one of those interested parties, as I continue to consider making the switch to .25/34gr for my long range uses).