I finally ordered a Wildcat

Replace the fx regulator by a Huma regulator and enjoy.

Shoot it first and see if you think it needs improvement. I've got a .22 WC, haven't done a thing to it and I couldn't be more pleased.

My thoughts are to find and order o-rings ahead of time so you have them when you need them.

For my Royale this has been breech seals, the seal on the male foster, and regulator seals.

I have owned 2 Wildcats, a .25 cal and a .22. I’ve heard so much about the Huma reg that I too ordered one but haven’t installed it yet. Let me show you why. This is a 48 shot string I did after filling to 230 bar. I usually waste 3 shots to allow the gun to settle in before using the chrono. But this time I did not AND I shot until it started falling off the reg. Shot 47 was 889 and shot 48 was 884. Even counting these my spread was 17 and SD of 3. I then dropped my first shot along with the last 2. So look at the second picture first. I was hoping the 48 shot group would be at the top and the other at the bottom. You can see now I have a spread of 11 and SD of 2. Can the Huma be that much better? Also I shot 46 times before it started dropping off the reg. I also believe that if I were hunting iguanas that shot 47 & 48 would have hit its mark. That’s efficient!

Hawkeye had the right reply. 

Ditto what Longbrownbox said!

I have one of the first batch of Wildcats in .25 and it’s has been flawless,would not change a thing,until it gives you reason too

My 25 and my 177 both did the same thing. However, I have a huma now just waiting to install. After maybe 2000 shots (4 tins) through the 177, the reg went stupid. Right now it has an es of about 48. After the very first tin of pellets to allow the gun to break in, I shot 62 shots on the 25 with an es of 8. The 177 shoots 90+ shots at about 11. However, that is the difference I see. The stock FX regs work great. But they wear out and just go stupid. I'm sure the huma will wear out somewhere along the line. But it is much more durable than the stock one, from what people who already have them installed are telling me. So mine is going in tonight or tomorrow. 

And one other thing, this 177 could shoot 8 shots in one hole at 30 yards. I sent the pic here a few weeks back. The hole is only slightly larger than one pellet. Now, I'm lucky to get 2 pellets to touch with it. The speeds are so different, the pellets walk all over the place.
So now I have shot mine on the stock reg until it needs work. While I'm in there, I'll just put a Huma in.

Crusher

@crusher75060 have you tried replacing the o-rings on your FX regulator? I just did this on my Royale and it made a WORLD of difference! 

It went from shooting a string that looked like a downhill ski slope to this... BTW my air tank is low so this was only about 40 shots starting with a 190 BAR fill:

Max FPS 852
Min FPS 843
Avg FPS 847
SD 2.02
ES 9 (1.06%)
Avg FPE 28.9 


FPS FPE
845 28.70436323
849 28.97676373
850 29.04506485
851 29.11344638
847 28.84040267
849 28.97676373
848 28.908543
848 28.908543
850 29.04506485
852 29.18190832
849 28.97676373
848 28.908543
848 28.908543
847 28.84040267
848 28.908543
844 28.63646411
849 28.97676373
848 28.908543
849 28.97676373
844 28.63646411
848 28.908543
846 28.77234275
848 28.908543
849 28.97676373
846 28.77234275
847 28.84040267
847 28.84040267
847 28.84040267
846 28.77234275
848 28.908543
848 28.908543
850 29.04506485
846 28.77234275
846 28.77234275
847 28.84040267
845 28.70436323
845 28.70436323
845 28.70436323
846 28.77234275
844 28.63646411
843 28.56864539

That is a very nice string and it is what mine USED to look like. I figure I'll put in the Huma on the 177 and replace the o-rings on the 25 and just see what happens. Thanks for the info.

Crusher

Yes, I wouldn't mess with the stock reg. until it shows it doesn't work correctly. It is also much harder to adjust than the Huma. One thing I noticed is that when taking the reg. out and in to make adjustments, the outer sealing O-rings can either wear out or become damaged, usually by abrasion against the inner threads when pushing in and pulling out. Can't be helped. I'd advise when ordering your Huma to order the rebuild kit at the same time. Its about $7 and well worth it, if just for peace of mind...
​Mike

I bought one of the original .25s and like others have said, I love it. I don't shoot near as much as most folks so I haven't had any issues. I'm having my stock dipped this very week (Hope to receive it back by week's end). Looking forward to Optifade Alpine camp pattern!

get some JSB pellets and a DonnyFL Sumo

LOTS of pellets! Maybe an extra mag or two. You can look for a rail to mount a bipod if you plan on using one. Don't spend a lot on the rail like some places charge. You can get one for 5-6.00 at the local gun shop in the AR section. You also might like a mag holder so your not pocketing your extra mag. There are two types for sale. Both great. Being new, I wouldn't pay any attention to the reg change. Vary few FX regs fail. It's an option if you should have a problem. but chances are small. You are going to need some breach O-rings. The O-ring in the barrel that the pellet and probe push through loading every shot. Again don't get caught paying the high price the airgun suppliers charge. Get the size and buy a bag of 50 or 100 from the O-ring store for 5 bucks or so. I have a 22 cal that has over 30K rounds through it and hasn't needed a thing except the breach O-ring. It's great the new MK-II version just came out. Makes for some great discounts on the MK-I's. I just bought a discounted .177 cal MK-I. I have trouble believing the new MK-II with the X-barrel could be any more accurate. Good luck. Have fun. Sylvan

Hi Kann, 
I agree with Hawkeye and some of the other guys...if it ain't broke don't fix it! If some day your regulator starts giving you problems then change it out for a Huma Regulator. They are easy to self adjust and remain consistent over time without creeping up and down and fluctuating wildly. So rather than think about modifications maybe you would like to think about some cool accessories. There are many aftermarket items you may find interesting such as extra mag holders, bipods, slings, silencers, etc.

I prefer the J.P. Brewer in stock mag holder so here is a link to it and one other you may prefer better: https://www.youtube.com/watch?v=L99jOvJP190,  
http://www.airgunsofarizona.com/mags-clips-loaders-holders/magazine-holder-for-fx-wildcat/.

I prefer the Atlas Bipods and the Harris Bipods, the FX Picatinny Scope Rail, the FX No-Limits Scope Rings, and both the 4.5" and 6.5" Huggett Moderators, and the Viking Tactics Two Point Sling. https://www.vikingtactics.com/category-s/1833.htm. I also have a MagPul QD Release on my picatinny rail for my Viking Tactics two point sling.

I also prefer the Athlon Midas BTR 2.5-15x50 SFP IR Scopes on my rifles due to their crystal clear optics and simple uncomplicated reticles. 

Here is couple pics of my Wildcat so you can see how the picatinny scope rail, Atlas bipod, and J.P. Brewer mag holder looks. You will also notice I sanded down the bottom of the pistol grip and butt stock so they sit flush and level to make her more stable and less tippy on the bench. I took over an inch off the bottom of the butt and 1/4" off the bottom of the pistol grip. Then I added a slim layer of rubber bicycle inner tube to the bottom of both the grip and stock to make them non-slip. I also added a piece of 5mm thick neoprene to the cheek rest to make it more comfortable and non-slip. In the summer that black cheek rest would get hotter than a firecracker in the Sun.This should give you a few ideas...
All the best, Chuck