FX How to FX maverick tune?

[RC_Bladeworks]

This right?
I want to tune my 22 cal fx maverick compact to shoot my hades pellets at around 905. I first check my hammer spring screw and make sure it's at the max 6mm out and set wheel to 7. Set my second reg to 100 bar and 1st reg to 135 bar.
Take shoots to see fps.
Too high - lower reg pressure
Too low - raise reg pressure

Here is where I'm a bit confused. Do I want to set the power wheel at 7 then tune it at that setting to my desired fps of 905
or
Set the power wheel half way at 3 or 4 and tune that to the desired 905 fps?

 

[RabbitofCaerbannog]

This right?
I want to tune my 22 cal fx maverick compact to shoot my hades pellets at around 905. I first check my hammer spring screw and make sure it's at the max 6mm out and set wheel to 7. Set my second reg to 100 bar and 1st reg to 135 bar.
Take shoots to see fps.
Too high - lower reg pressure
Too low - raise reg pressure

Here is where I'm a bit confused. Do I want to set the power wheel at 7 then tune it at that setting to my desired fps of 905
or
Set the power wheel half way at 3 or 4 and tune that to the desired 905 fps?

Doesn't really matter. Preferably go to max on the wheel then get a velocity 5% higher than your desired velocity... About 950... Then Start rolling the wheel back. Once you're in the range of the velocity you want, start using the hammer adjuster to make micro adjustments to fine tune till youre at the desired velocity and your SD and spread are minimal. I wanted to shoot 885 with 30gr slugs, I set my wheel to 23/max, then brought the 1.5mm hammer tension screw up until my velocity would raise no more. The started raising reg pressure 5bar at a time, giving ⅛ turns of the hammer tension screw until the velocity peaked, letting me know to add more pressure until they were going 928fps. The. Rolled back to 17 and I was getting 870-893... Then made micro adjustments on the hammer spring until I was at 887.4 average with an SD of 3.2 and an extreme of 9.


I'm on a .25 600mm Dreamtac.. but for example i started at 100Bar and Minimal Hammer spring, didn't ever bother measuring it.
126BAR reg, 17, roughly 65-72.5% of the hammer screw tension available... 500cc 250 bar fill 100+/- shots per fill at 52FPE.

I don't know about the dual reg... I shoot a crown mk2 and a Dreamtac Bottle +plenum with single regs and a 23 position wheel.

 

[RabbitofCaerbannog]

Doesn't really matter. Preferably go to max on the wheel then get a velocity 5% higher than your desired velocity... About 950... Then Start rolling the wheel back. Once you're in the range of the velocity you want start using the micro adjustment to fine tune till your at the desired velocity and your SD and spread are minimal. I wanted to shoot 885 with 30gr slugs, I set my wheel to 23/max, then brought the 1.5mm screw hammer tension screw up until my velocity would raise no more, the. Started raising reg pressure 5bar at a time, giving ⅛ turns of the hammer tension screw until the velocity peaked, letting me know to add more pressure until they were going 928fps. The. Rolled back to 17 and I was getting 870-893... Then made micro adjustments on the hammer spring until I was at 887.4 average with an SD of 3.2 and an extreme of 9.

You'll find you can hit that velocity at multiple settings. Personally I like the higher pressure with a lighter stroke. I get higher shot count and quieter shots.

I could get 900fps at 100bar, But it would get me about 60 shots from 250-150 because the dwell would be so damn long. i could get it at 110 and 115 and every increase got mildly better until i found the magic spot. 122-126 Quiet as all hell, Can't even feel the shot. High shot count, Good power, Insane accuracy. Aside from finding a good regulator harmony, i imagine you'll find have a similar experience

 

[RabbitofCaerbannog]

This right?
I want to tune my 22 cal fx maverick compact to shoot my hades pellets at around 905. I first check my hammer spring screw and make sure it's at the max 6mm out and set wheel to 7. Set my second reg to 100 bar and 1st reg to 135 bar.
Take shoots to see fps.
Too high - lower reg pressure
Too low - raise reg pressure

Here is where I'm a bit confused. Do I want to set the power wheel at 7 then tune it at that setting to my desired fps of 905
or
Set the power wheel half way at 3 or 4 and tune that to the desired 905 fps?

Also, when you initially raise pressure, your velocity is going to drop. Because you're at too low a spring tension.. so you're gonna adjust up until your velocity drops or no longer rises. THEN, Back the hammer spring screw back a tiny bit, that means you've reached the velocity potential for that pressure.

 

[Patrick1]

Suggest you look into the Easy tune system from Shooting with Phil. Soooo easy to tune my Maverick.
Many YouTube videos on this.

 

[MikeVV]

Check out YouTube. There's some very good videos on the subject.
Here's a couple of good ones.

Mike

 

[Trucker3573]

Just my opinion and it goes against what you see on YouTube. Do not start with the internal hammer adjuster maxed. Do the opposite and turn it clockwise in all the way or almost all the way. Set second reg to 90 bar. Where you set the power wheel during tuning is just personal choice. Depends on how much range of adjustment for turning down you want. Shoot over a chrono and work the internal screw upwards (counter clockwise) until the velocity stops going up. Fire several shots at each setting to give everything a chance to settle in at that setting. Go slowly as to not way over shoot the peak. Once you hit where you get no velocity increase or a slight decrease turn the screw back clockwise a little bit. That spot should produce really consistent velocity. It will also tell you , depending on velocity, whether you need to decrease or increase reg pressure and re adjust hammer setting in the same manner. I think 90 bar will be pretty close though.

 

[Trucker3573]

I should clarify what I mean when I say “each setting “ in my above post. I’m referring to the setting of the internal adjuster screw each time you move it. As far as the big power wheel goes you should be turning it back to the exact same number each and every time before you shoot over the chrono. I always just used 7 when I tuned so it was easy to remember where the best tuned spot was.

 

[RabbitofCaerbannog]

Just my opinion and it goes against what you see on YouTube. Do not start with the internal hammer adjuster maxed. Do the opposite and turn it clockwise in all the way or almost all the way. Set second reg to 90 bar. Where you set the power wheel during tuning is just personal choice. Depends on how much range of adjustment for turning down you want. Shoot over a chrono and work the internal screw upwards (counter clockwise) until the velocity stops going up. Fire several shots at each setting to give everything a chance to settle in at that setting. Go slowly as to not way over shoot the peak. Once you hit where you get no velocity increase or a slight decrease turn the screw back clockwise a little bit. That spot should produce really consistent velocity. It will also tell you , depending on velocity, whether you need to decrease or increase reg pressure and re adjust hammer setting in the same manner. I think 90 bar will be pretty close though.

There are people who start at full internal hs?
They just go down until they hit a rise and get consistency?

 

[HogKiller]

There are people who start at full internal hs?
They just go down until they hit a rise and get consistency?

Not if they are smart, easier to work out, you really don't need to start at 'zero' but if you do, go out in 1/2 turns, then 1/4, then 1/8's then tiny fractions until you start backing off. I'm not going to disagree with starting at 90bar but I'd suggest setting #1 first to about 135 to 140 bar. Faster more consistent fills. If the OP is expecting pin point accuracy with Hades, He'll be disappointed. He also mentioned a given speed, don't test for speed, test for accuracy, let the speed fall where the pellet / gun wants it to be.

 

[Headshots]

I would set your PW at 7 and find your peak where your at now . 100 bar on the second reg could be close but probably 85-90 would be my guess. If your too fast or slow then make small pressure adjustments and adjust for peak as you go. As others have said its easiest to start low , 80 bar for light stuff , work up . Your peak should be slightly faster than your target fps so you can back it off some for efficiency. I have never started with my hammer maxed.

My target fps was 888 with 18 gr pellets with this tune on my Maverick .22 600mm.

 

[Chukar60]

Lots of ways to skin this cat.
I start with the IHS @ 6mm it will go out a bit further but 6 is safe.start at around 90 bar and work your way up just as others have stated. With a short barrel like the compact I will go 8-10% over my target speed. I want the shortest burst of air possible to reach the desired velocity.
Is this better than what others have suggested? To me yes. Others probably have different experience that states otherwise. Lesson? We can give you the basics and you will develop your own system with experience.

 

[Patrick1]

 

[Patrick1]

It’s just so easy!

 

[Trucker3573]

There are people who start at full internal hs?
They just go down until they hit a rise and get consistency?

Yes it works but in my opinion I don’t like it. Just makes more sense in my mind to start low and work up rather than start by smashing the hammer into the valve at full power if you know the regulator pressure isn’t going to require it. Seems stupid wear and strain on internal components.

 

[RabbitofCaerbannog]

Yes it works but in my opinion I don’t like it. Just makes more sense in my mind to start low and work up rather than start by smashing the hammer into the valve at full power if you know the regulator pressure isn’t going to require it. Seems stupid wear and strain on internal components.

The more I think about it the more I can see the upside. One shot per pressure will let you know up until you get into the correct neighborhood.

I've always worked by backing the internal out most of the way and working up.. hit a pressure. Adjust internal ⅒ at a time until I hit the peak, increase 5bar. Same drill until the shot is flying far above where I want it. Start fine tuning the internal until that high speed is consistent. Then work down with my power wheel. When near my target speed, the shot is gentle and quiet. I fine tune to perfect the balance and I'm. Done. Then I shoot for weeks and get the damn itch again and do it again. And again.

 

[flynviking]

The post is a bit old but I thought I would add a few comments.

First, I can vouch for the the Shooting w/ Phil Quick Tune System. It is a game changer for tuning the Maverick and completely repeatable. You will want to upgrade your reg pressure gauge to a digital gauge at the same time.

Second, I have found in my Maverick .22 Compact the Hades shoot extremely well at 90 BAR on the reg and a velocity of 875fps. I could get that same velocity at 75 BAR but they weren't nearly as accurate. My assumption is that at the lower reg pressure the skirts weren't fully obturating to fit the bore.

I've also found that 90 BAR works well with JSB 18.13, so for my Maverick that's a good all around reg pressure if I want to go back and forth between the Hades and 18.13.

 

[Patrick1]

I have the same setup, exactly! As far as I’m concerned, this innovation makes the Maverick the easiest airgun to tune AND the avg velocity, std deviation and high/low velocity were soooo dramatically improved! This is a “no brainer” for sure if you own a Maverick or Wildcat!!!