TnCnDn said:

11/16×13×16×1×16 ?

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3/32

My stock barrel was inconsistent and required a lot of cleaning so I've got the C88 liner on mine and a 500 superior and 700mm heavy liner. It lightens the gun up a lot, which for me is a bonus.

It was a process getting the liners sorted with testing pellets/slugs and making adjustments but I've .22 I've settled on .217 JSB KOs at 950fps with the Heavy liner. Getting MOA +/- at 100m.

Check tension of the barrel shroud and uses some weak loctite on the barrel kit and shroud grub screws. DaveG and Paul that sells on eBay have drilled a small hole in the end cap so you can insert the drill bit to really tighten it down.

Adjust the pellet probe dept by removing the top rail and turning the cocking rod in. My accuracy improved a lot after adjusting it in 1.5 turns.
I didn't measure the liner lead in vs the stock barrel lead in but I'm assuming the FX liner lead in is longer. Even with larger sized slugs I had little to no resistance chambering them when I initially installed the liner, vs the stock barrel I had some.

Try a few moderators. I have about 6 and some improved accuracy while others made it worse. I settled on a 3d printer Subscriber mod my friend printed as it got me the best accuracy.

Thanks. The wheel goes to all settings now without changing anything. I dont know why the slider was going back and forth like it was attached to the wheel. Maybe it was dirty and got stuck somewhere. I dont think that T9 screw was ever messed with.

steve123 said:

Nice group. Ammo?

Yep these V3's in 25 are a sweet spot in the pcp airgun world.

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JSB knockouts.

A .25 just hits so much harder. Same velocity, more weight, bigger hole. Just my observation. Speaking of pellets only. Going off into slugs opens new possibilities for .22 vs .25 but most or at least many pellet rifles will not shoot slugs as well. The .25 allows proper body shots on critters that for a .22 are only head shots.

I hate taking the buttplate off so I made a prototype of a hammer spring tool…. A long skinny screw driver can work but a lot of them have fatter angles on the head makes I almost impossible to turn.

Trucker3573 said:

A mí me parece un poco caótico. Una pistola de 2500 dólares y una puesta a punto sin cronómetro. Ni me lo imagino. Personalmente, con las pistolas de efectos, casi nunca uso el macro al afinar. La clave está en el micro. Solo lo usaré para ahorrar tiempo. Al afinar, intentando encontrar la velocidad de meseta para una presión de regulación, se puede usar el macro para adelantar un poco. Sin embargo, no lo uses como fuente principal. Estoy de acuerdo en que ir subiendo de bajo a alto es la mejor manera de hacerlo. La atención debe centrarse en el microajustador y un cronómetro es absolutamente imprescindible.

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1st - I start the adjustment with a low regulator, 75 bar, and the macro position at number 13, which is recommended by FX. I don't use a stopwatch for this step.

2nd - I shoot three times at the same point. I'm looking for precision, single-hole shooting. I'm not looking for speed at this step.

3rd - I repeat the process at each macro position from position 13 to position 23. Throughout the entire process, I only change the macro position; I don't touch the micro at all.

4th - At macro position 21, the PCP shoots single holes, now using a stopwatch, and measures 941 fps.

5th - I want to know if I am at the top, I put the macro to position number 22 and stopwatch, I get 975 fps, I put the macro to position 23 and stopwatch, I get 978 fps. As the macro wheel has no more positions I give it 3 clicks with the micro and stopwatch, I get 978 fps, I am a little above 4% of the maximum power with the regulator at 75 bar.

Conclusion: With the macro in position 21 and the micro in position 2.3, I get incredible accuracy—that is, I have a low regulator and a loose spring.
This tuning allows me to use a pellet weight x with complete accuracy, and since the macro is in position 21 and the micro in position 2.3, I can shoot other pellets of lower weight by simply adjusting (lowering) the macro wheel and making micro adjustments.

Just posted the video under "Hunting" section.

Enjoy.

Also the table it sits on was one i made from a shipping pallet close to 30 years ago and it sits on wheels and has a hole cut in top to hold my tank its a 6.8liter tank. Idealy you want the tank higher than the compressor but i wanted my setup to be compact !nd short

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Putting QC, (quick change), studs in the FX King GRS​

Ron

Wow, that is a lot of shots!

Coyotes are my pest control as their diet is one of gophers, moles, and field mice. Killing a coyote would be very foolish. When I catch pocket gophers in my traps I leave them out for the coyotes as a treat.

With my .25 PCP rifle I have killed wild turkeys and a doe and a few cats that have been on my property. A Hill pump was replaced with a $300 electric compressor that I bought on Amazon. The $300 electric pump has replaced the Hill which has sat in a closet for the past two years.

Ok great this gives me more info to look in to this further. Thank you.

Hello Jet one owners, My jet one was preforming superbly til it would no longer stay cocked. Hatsan usa sent me a new hammer sear, i installed it and it did not fix the issue. They requested the gun back for inspection. After they returned it to me there was a short note saying they changed out the trigger sear , hammer sear , hammer and hammer spring. Well needless to say that fixed the hammer sear cocking problem.
But now the gun is shooting terrible . Before the work they did this jet 1 was shooting dime size groupa at 25 yards with a 3x9 scope using jsb 15.89 hades pellets. 11 out of 14 shots you could cover with a dime. When i sent it in there were no spacer washers on the hammer to increase tension . When it returned there were 3 1mm washers on the hammer lug. Since i have shot the gun with 1, 2 ,and 3 washers or spacers and also completely removed all three. Still no accuracy as achieved before they handled my gun. Tested also with Jbs Ex 15.89 and Jts 18.1 pellets. At this time to dont Know what to think or where to start. I did take out the supposed new hammer and found that the forward most portion that strikes the valve was flawed , like there machineing missed 180 degrees of the camfer on the hammer face or they dropped it and it hit steel.Any way it had a burr and i fixed that. Cleaned it all up and reassembled and light lube. Will do more testing tommorrow. But what i think is they sent me and old worn out hammer spring and tried to fix it with the tension washers , but its so inconsistent that it might as well be a wall hangers. Any Ideas ???????

igolfat8 said:

Lou (sandbagger), wow a 750? You-da-man … man! Congrats!

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It is time for him to be a man and shoot in Pro Class. Haha

Star7 said:

I had a 392 built with extended pump arm and billet mechanism. I think that the 2-stroke advantage over OEM is correct. I've never pumped to 14 strokes as that resembles work. I am very pleased with this gun and need to see if he can fit in a 397 that I have.

I did several trials using 3pumps up to 8pumps and the trajectory for each group was really very reproducible. I keep that with the gun, so I know where I am hitting at given ranges. To be honest, I never needed more power than 7 or 8 pumps gives me with the Williams peeps.

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I'm one of those "Need to know" types, so I'll have to pump it 14 times for at least 3 shots, so I can see what it does.

Guve Tim a shout, he got mine in really quick.

What’s the most epoch part ?? Skout, making their own moderator that will screw directly onto most Airguns out there however, needs an adapter to fit their own guns. Good job guys. Slow clap for that one.

Neu said:

Finally got around to tuning this little guy over the last few days after adding a regulator. Getting a little over 5 mags (65-70 shots) out of it with a ES of 10 SD of around 3. Damn rifle is a tack driver out to 50 yards. Not to bad for under $200 all in with it.

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Yes,One of my favorite budget guns.I got three of them

DoSqH said:

If I do go down the Panthera path, should I get a Slug Power Kit to start?

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I'm not sure what comes in the kit, but I use the heavy 8 mm hammer for higher reg pressure, and a pin probe. The pin probe will get you 10-15 fps if I remember correctly.

The "enhanced" transfer ports like Huma do not provide much benefit for the effort required to install them, compared to the hammer / pin probe.

ChuckHunter said:

Hammered a few sky rats this morning!
TX200 HC .22 shooting JSB 14.3 Jumbo Express. At least this many or more still on the barns and loft! Springer sniper baby
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Pest control right there!!

…Flexible if you want to shoot PRS at a high level!

Shown here is Francis Colon shooting a FX DRS Pro (for 2nd place) at the 2025 Rocky Mountain Airgun Challenge!

JungleShooter said:

Great vid. Great shot.
Very nice!

How do you paint them?
Is there an easy/quick method?

Thanks.
Matthias

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Search: tracer painting on Youtube....or try try tracer painting trays in Ebay....that should point you in the right direction.

Good pricing on Amazon for these scopes, less than going thru DiscoveryOpt website and a lot easier to return if there’s a problem

In cases like this, I always suspect that a gauge is lying to you. Secondly, most all male foster fittings have a rubber plug in the center that provides a check valve function, just as an O ring does on probe fill ports. No springs are used. To prevent a check valve function on male foster fittings, simply punch out the rubber plug. It is also a really good idea to use more than one pressure gauge, as some do indicate false pressure readings. I use 3, one on the compressor, one on the fill whip and another on my bottle. It is cheap insurance. Gauges do fail and HPA can be very dangerous.. Perhaps the OP does not understand what a deadhead test is. All it is, is a fill attempt with the compressor against a tank with a closed valve watching the whip pressure gauge.

That's weird about the pm, it worked for one reply. Oh well. Had you popped up a couple years back I was living in Sandwich. So for you, it's about 1.5 hours to Mass Rifle, maybe an hour to Marlborough, and 2 to Vernon ct or Palmer ma. As i said, it's not to bad considering how far I had to go for ft years ago.

I've dabbled in mini rc helicopters for a few months to see if I liked it. After a few hundred dollars in broken choppers I decided the money was better spent on pellets.