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?

 

[$p00kygH0ST]

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.

 

[$p00kygH0ST]

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

 

[$p00kygH0ST]

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.