Hello AirgunNation Peoples,
The Power Plenums for my FX Dreamline .22 (by FX) and Wildcat MKII .25 (by Huma-air) showed up in the mail yesterday.
And six hours of installation, tuning, testing, and zeroing equalled what??
Yes, my two Bullpups (FX Dreamline .22 & the FX Wildcat MKII .25) are hitting hard and accurate with heavy pellets and slugs!
See the background stories / threads on these guns:
https://www.airgunnation.com/topic/2-plenum-extension-fx-dreamline/
https://www.airgunnation.com/topic/extremely-good-slug-shooting-with-standard-25-caliber-wildcat-mkii/
Just wanted to share some photos in sequential order of the install, information about the tunes, and chronograph results.
The plenum extensions aka “Power Plenums”.
My FX DreamPup’s 2” plenum extension (self-made) comparison pic to the Huma-air FX Wildcat MKII power plenum.
Decided to stack the plenums in the DreamPup .22 (my 2” extension and FX’s DL plenum) along with the externally adjustable AMP regulator.
A quick fit test..
My signature carbon fiber wrap and final installation.
Put the barrel bands back on.
Pressured up and leak checked..
DreamPup completed!
Now, the FX Wildcat MKII .25, it will be receiving the Huma-air designed XL Power Plenum 30cc. Using the Huma regulator which was already installed (previously set @ 135 bar).
I didn’t get pictures for each step with the Wildcat MKII .25, but it went much like the DreamPup’s installation.
Wildcat MKII complete!
Chronograph results and tune setups for the different projectiles:
DreamPup .22 ( Amp reg. @ 125 bar)
Nielsen Specialty Ammo 23 grain HP Slugs
Transfer port: “25./.30”
Hammer Spring Tension: “MAX”
JSB Redesigned Monsters 25.39 grain Pellets
Transfer port: “25./.30”
Hammer Spring Tension: “MAX”
JSB Jumbo Heavy 18.13 grain Pellets
Transfer port: “25./.30”
Hammer Spring Tension: “C”
Wildcat MKII .25 ( Huma regulator @130bar ). All Wildcat projectiles use the same tune settings.
Nielsen Specialty Ammo 26.8 grain HP Slugs
JSB King Heavy MKII 33.95 grain Pellets
Air Arms Diabolo Field 25.4 grain Pellets
To sum things up, both of these Bullpup’s power, accuracy, and efficiency has jumped to the next level! Less regulator pressures, higher powers, cleaner / smoother / less violent shots, and shoots heavier pellets or slugs at perfect velocities! Can’t find one negative...
Questions? Comments?
Thanks for your time!
JoeKool
The Power Plenums for my FX Dreamline .22 (by FX) and Wildcat MKII .25 (by Huma-air) showed up in the mail yesterday.
And six hours of installation, tuning, testing, and zeroing equalled what??
Yes, my two Bullpups (FX Dreamline .22 & the FX Wildcat MKII .25) are hitting hard and accurate with heavy pellets and slugs!
See the background stories / threads on these guns:
https://www.airgunnation.com/topic/2-plenum-extension-fx-dreamline/
https://www.airgunnation.com/topic/extremely-good-slug-shooting-with-standard-25-caliber-wildcat-mkii/
Just wanted to share some photos in sequential order of the install, information about the tunes, and chronograph results.
The plenum extensions aka “Power Plenums”.
My FX DreamPup’s 2” plenum extension (self-made) comparison pic to the Huma-air FX Wildcat MKII power plenum.
Decided to stack the plenums in the DreamPup .22 (my 2” extension and FX’s DL plenum) along with the externally adjustable AMP regulator.
A quick fit test..
My signature carbon fiber wrap and final installation.
Put the barrel bands back on.
Pressured up and leak checked..
DreamPup completed!
Now, the FX Wildcat MKII .25, it will be receiving the Huma-air designed XL Power Plenum 30cc. Using the Huma regulator which was already installed (previously set @ 135 bar).
I didn’t get pictures for each step with the Wildcat MKII .25, but it went much like the DreamPup’s installation.
Wildcat MKII complete!
Chronograph results and tune setups for the different projectiles:
DreamPup .22 ( Amp reg. @ 125 bar)
Nielsen Specialty Ammo 23 grain HP Slugs
Transfer port: “25./.30”
Hammer Spring Tension: “MAX”
JSB Redesigned Monsters 25.39 grain Pellets
Transfer port: “25./.30”
Hammer Spring Tension: “MAX”
JSB Jumbo Heavy 18.13 grain Pellets
Transfer port: “25./.30”
Hammer Spring Tension: “C”
Wildcat MKII .25 ( Huma regulator @130bar ). All Wildcat projectiles use the same tune settings.
Nielsen Specialty Ammo 26.8 grain HP Slugs
JSB King Heavy MKII 33.95 grain Pellets
Air Arms Diabolo Field 25.4 grain Pellets
To sum things up, both of these Bullpup’s power, accuracy, and efficiency has jumped to the next level! Less regulator pressures, higher powers, cleaner / smoother / less violent shots, and shoots heavier pellets or slugs at perfect velocities! Can’t find one negative...
Questions? Comments?
Thanks for your time!
JoeKool
. I have very good/impressive groups out to 50 - 60yd but everything opens up after 80yd. My Wildcat is shooting the 25.4gr at 890 and the heavies at 805fps. Joe, I am envious but I'll get there. 
