Front reg 120 Back reg 90 Trying to shoot some 34 gr Knockouts. I can not get the fine tuning and adjuster knob set properly.. Going from 1 to 7 decreases velocity instead of increasing. I have tuned the fine adjuster cw and ccw in several attempts but not making it work. Any help appreciated.
FX Maverick Tuning Help
- Thread starter Spyguy
- Start date
Settings seem way too low for 34 gr KO even if you have a 700mm barrel. Guessing you are smashing the valve too hard with such a low reg. Why going from 1-7 on wheel has opposite effect. What length barrel do you have ?
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Yupper, it helps a LOT when we know ALL of the details, caliber and barrel length are essential.
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You need to tune the Maverick for the maximum velocity you can achieve on number 7. After you do that the rest of the wheel should fall into place.
Then increase your reg pressure and continue to try to reach your velocity on the #7 position. If you are trying to adjust anywhere else but #7 you will not be able to get the gun settled down. Look for the FX Master Class video on YouTube where Ernest Rowe shows how to adjust the Maverick for maximum velocity.
I have a Maverick and could not achieve the velocities I was looking for. If you cannot get it with barrel length and reg pressure you may need to change the hammer spring and weight.
The hammer adjustment screw is very sensitive on the Maverick only adjust it a 1/4 turn at a time if you do it more it will be easy to get your tune way out of adjustment.
There is also a nylon insert that contacts the adjustment screw so it does not move. Make sure there is some resistance on the screw when you turn it because if there is not after repeated cycles the screw can move and change your adjustment.
Hope this helps.
Then increase your reg pressure and continue to try to reach your velocity on the #7 position. If you are trying to adjust anywhere else but #7 you will not be able to get the gun settled down. Look for the FX Master Class video on YouTube where Ernest Rowe shows how to adjust the Maverick for maximum velocity.
I have a Maverick and could not achieve the velocities I was looking for. If you cannot get it with barrel length and reg pressure you may need to change the hammer spring and weight.
The hammer adjustment screw is very sensitive on the Maverick only adjust it a 1/4 turn at a time if you do it more it will be easy to get your tune way out of adjustment.
There is also a nylon insert that contacts the adjustment screw so it does not move. Make sure there is some resistance on the screw when you turn it because if there is not after repeated cycles the screw can move and change your adjustment.
Hope this helps.
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More info .25-700mm liner. Oddly it shoots the 34.9 Knockouts at 940fps in adjust position. Other numbers decease velocity
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I set the adjustment screw to 6mm to start. I watched Ernest tune and all seems straight forward till I try it.
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I’m not a tuner but I’m guessing in the “adjust setting” or 0 it is at the peak of the velocity once you go higher you’re actually going past and dropping velocity
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6mm is max. Way way too much for 90 some bar on the reg. That is why you are getting the opposite effect with PW. If it were me I would turn the wheel to adjust. Take your Allen key and turn the internal screw clockwise until it stops. Back it out a little. Turn PW to 7 and shoot over chrono. Slowly work that internal screw back out counter clockwise until the speed no longer increases. That will be the max velocity you will be able to achieve at that reg pressure. If it’s what you want good to go. If not you will have to re adjust the reg and internal screw accordingly. Set like this your power wheel will work properly. This is how I do it. My personal preference. I don’t like setting the hammer pre load to max and then working downward to find the harmony. I like to start low and work up. Just remember to fire several shots over the chrono before making the next adjustment on the internal screw as it takes a few shots for everything to settle in to each new adjustment.
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Allow me to add, As an FYI and it doesn't really matter but one turn of the screw is 1 mm. It's best to take out the HSA measure the over all length, 19.3 mm is a good starting point, I think the OP's 90bar is way too low for that weight slug but maybe he's got the golden gun.
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IF the OP is going backwards on the dial, then I'll bet the HSA is out about 21.5 to 22mm, just about when it can't be cocked if memory serves. If he's happy with the speed of the slugs, if they are the only ones he uses, leave it alone and don't worry about it. I've found that if you don't have the data to return to where you were and counting twists is a fools exercise, because you don't have hard data for then things go south to return to.Yeah I suspect you may be right for sure
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Agree with others. Not enough regulator pressure and you're smashing the hammer.
Try 130 / 110 on the regulators. Turn the micro most of the way in then back out until you find the top of the power curve. This is a good starting ballpark. Work reg pressure and hammer preset up in coordination until you achieve your goal.
I shoot 34 grain pellets around this setting with my .25, 700mm barrel and the stock FX hammer (the middle of the three sizes). You may need more pressure for the slugs.
Try 130 / 110 on the regulators. Turn the micro most of the way in then back out until you find the top of the power curve. This is a good starting ballpark. Work reg pressure and hammer preset up in coordination until you achieve your goal.
I shoot 34 grain pellets around this setting with my .25, 700mm barrel and the stock FX hammer (the middle of the three sizes). You may need more pressure for the slugs.
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Mav .25, I'm at 150 and 135, AEA 33.9's at 940 with a 700mm barrel, 26gr RMR hybrids at 1040fps, I'd say you can turn the HSA in all the way then back out 2.5 turns, 2.5mm that's a good starting point, make 1/2 turn moves until it goes nuts, then back off 1/4 turns then start with little tiny movements to find the sweet spot.
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Man that’s so much work . If you’re into it yeah that sounds fun. This is one reason I no longer own fx just so many variables. I want to just send it not guess the combo on a safe
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Thanks much. I will give it a go tomorrow and see how this helpful advice plays out. Special thanks for telling me why my PW was acting opposite to expected.
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