Tuning FX Maverick .30 - Tuning going backwards...

Just let me say this for my .22 Maverick with 600mm trying to get NSA 24.8g to go at 950, my 2nd reg have to be at 135b. 


If you want your 40g NSA to go at 950, I think you might have to set you 2nd reg to at least 150b. And start your micro to -8t or 6mm. Just guessing, idk. 


also I think, when you up there reg and the fps lower that mean you have open the valve fully(HST too high). Strangely when you open fully, the fps drops. I noticed that when I was tuning mine. 

get yourself a 11 gram hammer! i put my 30 cal 700 mm barrel on my 22 sniper with a 25 cal hammer and with 2nd reg at 135 with hammer spring maxed it shoots 47 g nsa to 970! with stock hammer you seem to have to use high reg pressure cause stock hammer is too heavy

Hi

I don't have a Maverick, but for a .30cal a reg at 105 bars is rather low, your problem pointing out that you need your hammer to hit the valve harder. You have to give more tension to the hammer spring and if that is not enough you will have to start changing the spring and hammer, here there are people with Maverick 30 cal and I will be able to indicate you better. 

Regards 

Enkey 

When I see this type of change it typically means you have too much hammer for the reg pressures. You are closing your value too early causing a decrease in speed. You are over your apex. I agree with the others you need to raise your pressures more, keeping 30 psi between them. Max on second, if using sock amp is 150 just FYI. Take that all the way up and start turning your Hammer in till you get speed changes. You will find the spot where you turn 1/4 one way and you lose speed, 1/4 turn the other and you gain speed. At this point turn down slightly will you get the exact max speed the gun is capable of giving you and and good SD, ES possibly but not always. This HOPEFULLY will correlate to accuracy, but not always also. 

I had a similar experience with my .30 Cal. Maverick. One thing I found that helps in a high power tune is the preload screw adjustment on the hammer. Ernest Rowe shows the process on a MK III Wildcat which is the same as a Maverick. I was able to easily get to 941 fps. after adjusting the preload screw out to 6mm, hammer wheel at 7 and having the first reg at 150 bar and the second reg at 125 bar. Hope the video will help.



https://www.youtube.com/watch?v=J-xWCqGO88M

Sasquatchlives said:

I have been trying to tune my maverick in .30 (700mm barrel) and have run into something odd...

I'd start with the following settings (which are factory settings) with a 43gr pellet (jsb exacts and NSA slugs with similar results)

Reg 1 - 130
Reg 2 - 100
Hammer macro 7

With the above settings, I get about 875 fps (on the fx pocket chronograph).

I'm trying to get a closer to 950 fps (with the same ammo as above) as the NSA slugs usually have performed well for me in that range, But as soon as I turn the regs up to above 135 (reg #1) and 105 (#2) the FPS drops from about 860 to ~744.

I have tried 3-to-4 tunes back and forth around these ranges with the same results. As soon as the regs get above 135 and 105 the FPS drops.

Any ideas on what is going on? I am new to tuning airguns so anything that might point me in the right direction would be appreciated!

Click to expand...

Sasquatchlives said:

I have been trying to tune my maverick in .30 (700mm barrel) and have run into something odd...

I'd start with the following settings (which are factory settings) with a 43gr pellet (jsb exacts and NSA slugs with similar results)

Reg 1 - 130
Reg 2 - 100
Hammer macro 7

With the above settings, I get about 875 fps (on the fx pocket chronograph).

I'm trying to get a closer to 950 fps (with the same ammo as above) as the NSA slugs usually have performed well for me in that range, But as soon as I turn the regs up to above 135 (reg #1) and 105 (#2) the FPS drops from about 860 to ~744.

I have tried 3-to-4 tunes back and forth around these ranges with the same results. As soon as the regs get above 135 and 105 the FPS drops.

Any ideas on what is going on? I am new to tuning airguns so anything that might point me in the right direction would be appreciated!

Click to expand...

I have undergone the same procedure with success,
1. 56mm hammer spring FX
2. Fx hammer spring spacers x 2
3. First reg 190
4. second reg 165
5. Neilson slugs 55 gr
6, Adjust power wheel 7

I am at a constant 965 FPS

with reference to the hammer adjustment screw approximately 1 to 1,5 turns from fully seated


Good luck

Bye the Bye this will kill your shot count, but I shoot large Iguina and need the power


Steve

I picked up a .30 sniper that had been tuned just like yours. Initially, pellet speeds were at 880fps.
I had to bump 1st reg to 170-ish. 2nd reg is 135-ish.
And if you have one, you know '-ish'.
Now the nielsen 49.5 slugs are running 965fps.

Also--- pellets worked fine out of the standard 'superior' liner. At 880fps, pellets were happy. They really don't like going much faster. Slugs HATED that smooth twist barrel! I had to put in the heavy slug liner to get accuracy with slugs.
Now?
Slugs---tuned down to 910fps--Power '7'--micro at 6mm.
Accuracy is absolutely 'minute-of-squirrel' at 200yds....and beyond.

I'm still getting 40 shots before I drop off the reg.

Baby steps! I love my Mavericks. I have a Sniper 22 and a compact 30. With the sniper I'm able to shoot a variety of pellets and slugs using the different power levels like what Ted said in his video about his Wildcat BT. I shoot 14.3 gr pellets all the way up to 30 gr nsa slugs. All are very accurate. But my 30 cal is another story. I made the mistake of trying to do too many things at once. Wanted to shoot 49.5 gr slugs at 950 from a compact. So I bought and installed Huma 14.5 gram hammer, stiffer 56mm spring, high flow pellet probe-you know the one you are all famiiar with cause you can't get the mag in unless u keep the cocking handle pulled all the way back. And a V2 transfer port. Had that gun all the way out to 150 on the 1st regulator, opened the 2nd reg all the way for pass through micro maxxed out. Couldn't make the 49.5 slugs go faster than 900fps. So I started converting the gun back to original state. I was trying to tune to push my 44.75 at 880. Converted everything back to original but the last thing I did was remove the 13gram hammer and replace it with the original hammer that has the washer on it. I think the difference in weight between these two hammers is about 1.5 grams. Took a shot and forgot I was still in adjust and my velocity was 801FPS with a 44.75! It jumped on the adjust setting alone over 200 fps. I had to take another shot just to see if I was imagining things! So like I said at the start of all this rambling, document completely your rifle specs and performance, then make very small changes then test to see if you are going in the right direction. I think the compacts are harder to tune because of the short barrel and very touching hammer, and hammer spring settings.

Cmsjaffe said:

I have undergone the same procedure with success,
1. 56mm hammer spring FX
2. Fx hammer spring spacers x 2
3. First reg 190
4. second reg 165
5. Neilson slugs 55 gr
6, Adjust power wheel 7

I am at a constant 965 FPS

with reference to the hammer adjustment screw approximately 1 to 1,5 turns from fully seated


Good luck

Bye the Bye this will kill your shot count, but I shoot large Iguina and need the power


Steve

Click to expand...

Hi Cmsjaffe.

I am going for the same reg pressures as you and same slug with my maverick 30 cal sniper. I'm just wondering what regulator you are using as 1st reg to hold pressure at 190 bar? Are you using FX AMP regulator with brass piston? If so, did you have to add any belleville washers to it or are you able to just use the stock washers?

I'm also wondering what the twist rate of your liner is.

Thanks.

grungy