I was thinking about bumping up the FPS on my Wildcat. Would like to shoot the 34gr JSB at around 930. Anyone have the details on what's involved? Hammer adjustments? etc...
.25 Wildcat Tune
- Thread starter Berky
- Start date
I don't the it is possible to shoot the King heavy at that velocity from wildcat with the stock parts. you may need to up the regulator setting and get a stronger hammer spring and heavier hammer to get those velocities. It will be a lot of stress on the valve so be be prepared for damages there.
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had one, and no not possible without mods. but, ernest rowe to the rescue! he can tune it to that level and i think he replace some parts to account for the additional valve stress.
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I don't believe it would be worth it for the sacrifice: faster performance for lower shot count and more wear and tear of o-rings.
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I guees I'll just keep it tuned for 25gr. Here's a tight 24 shot string.
6 02:39:24 PM
Description: Wildcat 3300---25grain
Temp: 86 °F
BP: 30.12 inHG
Shots
# FPS FT-LBS PF
31 916 0.00 0.00
30 915 0.00 0.00
29 918 0.00 0.00
28 914 0.00 0.00
27 920 0.00 0.00
26 915 0.00 0.00
25 912 0.00 0.00
24 909 0.00 0.00
23 917 0.00 0.00
22 913 0.00 0.00
21 914 0.00 0.00
20 912 0.00 0.00
19 915 0.00 0.00
18 916 0.00 0.00
17 915 0.00 0.00
16 914 0.00 0.00
15 916 0.00 0.00
14 914 0.00 0.00
13 913 0.00 0.00
12 910 0.00 0.00
11 910 0.00 0.00
10 908 0.00 0.00
9 913 0.00 0.00
8 912 0.00 0.00
7 916 0.00 0.00
6 912 0.00 0.00
5 914 0.00 0.00
4 919 0.00 0.00
3 917 0.00 0.00
2 917 0.00 0.00
1 917
6 02:39:24 PM
Description: Wildcat 3300---25grain
Temp: 86 °F
BP: 30.12 inHG
Shots
# FPS FT-LBS PF
31 916 0.00 0.00
30 915 0.00 0.00
29 918 0.00 0.00
28 914 0.00 0.00
27 920 0.00 0.00
26 915 0.00 0.00
25 912 0.00 0.00
24 909 0.00 0.00
23 917 0.00 0.00
22 913 0.00 0.00
21 914 0.00 0.00
20 912 0.00 0.00
19 915 0.00 0.00
18 916 0.00 0.00
17 915 0.00 0.00
16 914 0.00 0.00
15 916 0.00 0.00
14 914 0.00 0.00
13 913 0.00 0.00
12 910 0.00 0.00
11 910 0.00 0.00
10 908 0.00 0.00
9 913 0.00 0.00
8 912 0.00 0.00
7 916 0.00 0.00
6 912 0.00 0.00
5 914 0.00 0.00
4 919 0.00 0.00
3 917 0.00 0.00
2 917 0.00 0.00
1 917
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Your Wildcat is shooting very consistent. I have a suggestion do not even think about moding it.
How is the group at 50 yards and beyond.
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I am also interrested to get feedback from people who have increased the power of their .25 Fx airgun to something around 60fpe (wildcat, gladiator, verminator or royale).
Is there any risk to damage the valve or anything else?
The JSB heavies MK2 are far away better than the KING above 100 yards but I only achieve around 800fps with my .25 regulated Gladiator mk2.
I seriously think about increasing hammer spring tension and once I get no more speed -> increase regulator output (currently set at 130bars).
With the gladiator I should still get around 70-80 shots per fill VS 130 today I think.
Is there any risk to damage the valve or anything else?
The JSB heavies MK2 are far away better than the KING above 100 yards but I only achieve around 800fps with my .25 regulated Gladiator mk2.
I seriously think about increasing hammer spring tension and once I get no more speed -> increase regulator output (currently set at 130bars).
With the gladiator I should still get around 70-80 shots per fill VS 130 today I think.
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It seems like the process is backward here. You go through the risk of modding an (expensive) air gun to achieve something it couldn't do before such as take larger game or fix an accuracy problem. Velocity adjustments is a means to an end.
There is no issue with shooting heavier pellets at lower velocities if they are accurate. They will carry more energy further down range than lighter pellets anyway.
You can make your gun less accurate with a power increase too. It is not a given that max power = max long range accuracy. Things that are guaranteed with such a mod are more noise and fewer shots. There is also the potential for creating issues firing lighter pellets. Right now, you can fire a range of pellet weights well. Not just the heavy ones.
There is no issue with shooting heavier pellets at lower velocities if they are accurate. They will carry more energy further down range than lighter pellets anyway.
You can make your gun less accurate with a power increase too. It is not a given that max power = max long range accuracy. Things that are guaranteed with such a mod are more noise and fewer shots. There is also the potential for creating issues firing lighter pellets. Right now, you can fire a range of pellet weights well. Not just the heavy ones.
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Here is a string with the 34gr MKII
Created: 08-30-2016 11:45:18 AM
Description: Wildcat 3300psi --34gr
Bullet Weight (gr): 34.000
Temp: 85 °F
BP: 30.17 inHG
Shots
# FPS FT-LBS PF
24 820 50.77 27.88
23 822 51.02 27.95
22 831 52.14 28.25
21 821 50.90 27.91
20 823 51.14 27.98
19 828 51.77 28.15
18 817 50.40 27.78
17 819 50.65 27.85
16 823 51.14 27.98
15 820 50.77 27.88
14 827 51.64 28.12
13 821 50.90 27.91
12 828 51.77 28.15
11 826 51.52 28.08
10 823 51.14 27.98
9 821 50.90 27.91
8 827 51.64 28.12
7 825 51.39 28.05
6 825 51.39 28.05
5 828 51.77 28.15
4 822 51.02 27.95
3 830 52.02 28.22
2 826 51.52 28.08
1 828 51.77 28.15
Average: 824.21
StdDev: 3.73
Min: 817
Max: 831
Spread: 14
True MV: 825.33
Created: 08-30-2016 11:45:18 AM
Description: Wildcat 3300psi --34gr
Bullet Weight (gr): 34.000
Temp: 85 °F
BP: 30.17 inHG
Shots
# FPS FT-LBS PF
24 820 50.77 27.88
23 822 51.02 27.95
22 831 52.14 28.25
21 821 50.90 27.91
20 823 51.14 27.98
19 828 51.77 28.15
18 817 50.40 27.78
17 819 50.65 27.85
16 823 51.14 27.98
15 820 50.77 27.88
14 827 51.64 28.12
13 821 50.90 27.91
12 828 51.77 28.15
11 826 51.52 28.08
10 823 51.14 27.98
9 821 50.90 27.91
8 827 51.64 28.12
7 825 51.39 28.05
6 825 51.39 28.05
5 828 51.77 28.15
4 822 51.02 27.95
3 830 52.02 28.22
2 826 51.52 28.08
1 828 51.77 28.15
Average: 824.21
StdDev: 3.73
Min: 817
Max: 831
Spread: 14
True MV: 825.33
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Agreed, 50+ ft/lbs is not bad at all.
Yesterday I shot my R500 for the first time, after I installed a regulator (140bar) and a SHP valve.
It was shooting 245m/s max. with the HST optimized for that particular regulator setting, and I was getting very small groups at 50m.
Because I like to see what the possibilities are, I increased the reg. pressure a bit with 1/6 of a turn. (Haven't made a reg. tester yet.)
The speed after the adjustment was 255m/s with the HST optimized, and the groups were still very nice.
I read a lot of stories of people who crank up the hammer spring tension of their FX all the way, but this is totally wrong.
Besides that the speed will actually decrease instead of increase, you will definitely mess up your valve during time.
The only way of maximizing the speed of a Royale/Boss/Bobcat etc. is to start with low HS tension, and work your way up until the speed stops to increase. A chrony is a must.
If you increase the HST any further, the speed will drop again, and the valve will get a nasty beating every time you pull the trigger.
If the reg. pressure is increased, you have to do the same adjustments again, work your way up slowly.
The Royales can be tuned to impressive numbers, but you have to know what you are doing.
There are people who mess up their gun by their own incompetence, and blame FX for making a poor product.
I'd say, FX makes a bit more delicate product, but when tuned right, they will shoot like that for thousends and thousends of pellets. Besides that, I have yet to see a gun which shoots just as consistent as a regulated FX. Even my LG110 has a bigger spread than my Royales and Boss.
There is a reason why I have got 3 Royales and a Boss.
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Thx for your feedback. The way you perform your tune is exactly what i plan to do. I already own a chrony and plan to purchase a hand made reg tester.
Before spending money i wait to see for live experiences like yours.
So for a fx gladiator mk2 in.25 (same block as royale in fact) a 60fpe goal is achievable without damaging anything right?
It would be great to fire 33gr king heavies around 880-900fps
Before spending money i wait to see for live experiences like yours.
So for a fx gladiator mk2 in.25 (same block as royale in fact) a 60fpe goal is achievable without damaging anything right?
It would be great to fire 33gr king heavies around 880-900fps
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Doctor Zebra's prescription: more time shooting and having fun + less time obsessing over chrony numbers.
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Hey Weatherby, im trying to learn this tuneing.
when starting with low hammerspring pressure and working up until fps starts to decrease. Does it matter what bar my guage is on? of course i know not to go over factory recomendations or below regulator setting.
thanks.
when starting with low hammerspring pressure and working up until fps starts to decrease. Does it matter what bar my guage is on? of course i know not to go over factory recomendations or below regulator setting.
thanks.
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You kind of answered you own question
When you are above regulated pressure and below maximum fill pressure you are good to go.
Just make sure you have enough air so you can make several shots for a string.
Just above reg. pressure is not preferable, because it will drop of the reg. in no time.
When adjusting, stop at the point where the speed does not increase anymore. When you go beyond that point, the speed will drop, and the valve gets a beating.
My Royales are regulated at 140bar, my Boss 160bar. The 400cc bottle may be filled to 232bar, the 500cc to 250bar.
O yeah, and adjust in small increments
Regards,
Gijs
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