Tuning .25 Vulcan Gen 4 Power Plenum.

[zx10wall]

Client asked for a reseal, power plenum and tune for the 25.39gr Kings at 895 fps. I’m your Huckleberry . 

All seals changed, trigger job, power plenum mods and tune. What a sweet Vulcan. I put my Koi on to shoot it. I want to keep it. Light, compact, buttery smooth The icing that matters most, it’s a shooter too. Oh, she’s also beautiful  

Created: 12/23/20 03:47 PM
Description: Terry's Vulcan
Notes 1: Gen 4
Notes 2: 4 mags +2
Distance to Chrono(FT): 1.00
Ballistic Coefficient: 0.038
Bullet Weight(gr): 25.39
Temp: 75 °F
BP: 1008.87 inHg
Altitude: 120.00
# FPS FT-LBS PF
38 888 44.46 22.55
37 889 44.56 22.57
36 889 44.56 22.57
35 891 44.76 22.62
34 894 45.07 22.70
33 890 44.66 22.60
32 890 44.66 22.60
31 888 44.46 22.55
30 889 44.56 22.57
29 888 44.46 22.55
28 892 44.87 22.65
27 890 44.66 22.60
26 894 45.07 22.70
25 892 44.87 22.65
24 893 44.97 22.67
23 893 44.97 22.67
22 893 44.97 22.67
21 893 44.97 22.67
20 892 44.87 22.65
19 898 45.47 22.80
18 893 44.97 22.67
17 897 45.37 22.77
16 895 45.17 22.72
15 895 45.17 22.72
14 895 45.17 22.72
13 891 44.76 22.62
12 897 45.37 22.77
11 892 44.87 22.65
10 904 46.08 22.95
9 896 45.27 22.75
8 896 45.27 22.75
7 897 45.37 22.77
6 897 45.37 22.77
5 896 45.27 22.75
4 896 45.27 22.75
3 897 45.37 22.77
2 897 45.37 22.77
1 899 45.57 22.83
Average: 893.6 FPS
SD: 3.6 FPS
Min: 888 FPS
Max: 904 FPS
Spread: 16 FPS
Shot/sec: 0.1
True MV: 895 FPS

and just for all eyes to see, off reg shots:

Created: 12/23/20 03:47 PM
Description: Terry's Vulcan
Notes 1: Gen 4
Notes 2: Off reg shooting 
Distance to Chrono(FT): 1.00
Ballistic Coefficient: 0.038
Bullet Weight(gr): 25.39
Temp: 75 °F
BP: 1008.87 inHg
Altitude: 120.00
# FPS FT-LBS PF
44 875 43.17 22.22
43 883 43.96 22.42
42 888 44.46 22.55
41 884 44.06 22.44
40 886 44.26 22.50
39 882 43.86 22.39

what more can you ask for......

 

[FunGun]

Saweet! HUCK!

 

[Oregun]

Thing of beauty! You are a master tuner!!!

 

[Terryb00]

Killer Tunes, Derrick.

Well done!

 

[AirNGasman]

Phenomenal work D! But I like mine better, 

"what more can you ask for……" You just had to ask?

Okay; how 'bout a Uragan that shoots .22 Redesigns almost 1000 FPS, and averages 3/4" c-t-c five-shot groups at 100 yards regular as clock-work? Hey, you asked! 

Knowing you, I suspect it's just a matter of time.  Fantastic work, Bud!

 

[Mrshosted]

For the Plenum for the early Vulcan's are you still using the modified Kalibergun Plenum extension ? If so, I wondered if the tanks where the same diameter.

 

[zx10wall]

For the Plenum for the early Vulcan's are you still using the modified Kalibergun Plenum extension ? If so, I wondered if the tanks where the same diameter.

I PMed you bud. 

 

[Mikelo123]

Damn it Derrick!

I was done after our chat this weekend where we decided on the Prophet (as I told you I ordered it in .25 but ordered the .22 LW long range pellet barrel kit as well just for fun). As well as the Uragan King .30 but now I think I just may need you to build me a Vulcan...

My wife is gonna hate you....