Wondering if someone can help me. I am relatively new to PCP. I have a FX impact m3 25 cal, 700 mm barrel. I am trying to tune my gun to shoot 34gr Knockout’s or the NSA 34gr. If anyone have tuned their gun to shoot these projectiles, Will you be willing to share your tune?
Tuning Fx impact m3
- Thread starter semo4647
- Start date
Here is a great place to start.
www.airgunnation.com
Patrick
AEAC - FX Impact M3 Tuning Guide (interesting pre-video learning shared here)
I've begun probing the FX Impact M3 for learning nuggets out ahead of my upcoming YouTube M3 tuning guides. The learning I discover, I'll share here as I go, as a resource for new tuners seeking information on how to tune the M3. Experienced tuners, please feel free to chime in and share your...
www.airgunnation.com Patrick
Upvote 0
Start with final reg at 120-130, micro adjuster 4.25, macro 16, valve all the way out. Fine adjust from there to get things consistent.
Upvote 0
I have a tune for the NSA 29.5 grain slugs in the same gun I would share with you if you want. I am getting ready to shoot both of the slugs you just talked about and getting a tune for them. NSA first as I have them here, I'm shooting a 600mm barrel, so it may be a bit different for your gun depending.
Upvote 0
Here is my NSA 29.5gr. slug tune. Numbers are as follows, if you don't understand my code...Will be happy if you share the tune
1st reg=200bar
2nd reg=160 bar
Macro=15
Micro=4.75
Valve=3.5
83 degrees ambient temp., 27% humidity
Upvote 0
I have the same rifle... purchased 1 year ago. I am shooting 34 gr pellets & am changing to 34gr slugs... After alot of work & my rifle sent in for repairs (my fault) twice, I have decided to start back at the first.... I am going to get the M3 first set up for the best MV for the projectile. To do this I have outlined the process below...
To get best MV..... try....
FX suggests a 30-40 bar difference
between the 1st & 2nd regulator to
allow adequate pressure fill of
plenum.
Pellets should end up
~1st reg 150 bar
~2nd reg 110 bar
Slugs should end up
~1st reg 180 bar
~2nd reg 150 bar
Pellets fly well ~ 830-860 fps
Slugs fly well ~ 930-960 fps
*****
...PROCESS TO FOLLOW...
1. Open all adjustments....
Valve adjuster max...
all the way out.....5+ rings
HS (Hammer Spring) to ~ #8
Micro to minimum... #1
2nd reg to 110
1st reg to~160
2. Shoot 5 shots to get the MV... let the MV stabilize as the gun settles.
(This will find the starting 2nd reg
pressure level.)
3. Increase 2nd regulator until you
reach 15-20 fps above your target
speed.
...Shoot 5 shots... get MV... adjust...
(This adjustment finds the best
amount of air pressure to send
the projectile down the barrel.)
The pressure adjustment can be
INCREASED without removing the
the air tank.....but...... to decrease
the pressure THE AIR TANK MUST
BE REMOVED....
The reg. adjustment screw is behind
the trigger. Use a 2.5mm Allen
wrench with a ball head for
adjustments. Adjust the screw
counterclockwise to increase
the pressure. Very little rotation is
needed to alter the pressure.
4. Adjust the HS (Max wheel) until the MV is a few fps above the desired value...
...Shoot 5 shots... get MV... adjust...
shoot several shots to allow the gun to "settle in."
(This adjustment gives the best
HS pressure to the projectile.)
5. Now adjust the Micro adjustment until the MV is on the desired value.
...Shoot 5 shots... get MV... adjust...
(This adjustment gives fine
tuning of the HS tension.)
6. Close Valve adjuster (turn it in) until you notice it just starting to shave off
the last couple of fps ... you want to end up at the desired fps for projectile.
...Shoot 5 shots... get MV... adjust...
As adjustments are made, the MV will stay about the same until there is a definite drop. Set the valve at the position just before the drop.
Close the valve adjuster only 1/8
turn at a time.... very precise.
( The valve adjuster regulates the
time the air port is open. By
adjusting it down... turning valve
in and finding the MV decrease....
you adjust the airflow to stop
just as the projectile exits the
barrel. This ensures the projectile
exits the barrel without deviation
of flight from too much airflow.)
7. Adjust 1st reg pressure to 30 bar above the 2nd reg. pressure. The gun must be degassed to make this adjustment. Take the gas pressure canister off the gun to get to the 1st reg adjustment port.
( The ~30 bar pressure gradient
will protect the 2nd reg.)
8. ...Shoot 5 shots... get MV... ensure the MV has remained the same after all adjustments.
WRITE DOWN THE SETTINGS
9. Now the gun can be sighted in!
oncall-50
To get best MV..... try....
FX suggests a 30-40 bar difference
between the 1st & 2nd regulator to
allow adequate pressure fill of
plenum.
Pellets should end up
~1st reg 150 bar
~2nd reg 110 bar
Slugs should end up
~1st reg 180 bar
~2nd reg 150 bar
Pellets fly well ~ 830-860 fps
Slugs fly well ~ 930-960 fps
*****
...PROCESS TO FOLLOW...
1. Open all adjustments....
Valve adjuster max...
all the way out.....5+ rings
HS (Hammer Spring) to ~ #8
Micro to minimum... #1
2nd reg to 110
1st reg to~160
2. Shoot 5 shots to get the MV... let the MV stabilize as the gun settles.
(This will find the starting 2nd reg
pressure level.)
3. Increase 2nd regulator until you
reach 15-20 fps above your target
speed.
...Shoot 5 shots... get MV... adjust...
(This adjustment finds the best
amount of air pressure to send
the projectile down the barrel.)
The pressure adjustment can be
INCREASED without removing the
the air tank.....but...... to decrease
the pressure THE AIR TANK MUST
BE REMOVED....
The reg. adjustment screw is behind
the trigger. Use a 2.5mm Allen
wrench with a ball head for
adjustments. Adjust the screw
counterclockwise to increase
the pressure. Very little rotation is
needed to alter the pressure.
4. Adjust the HS (Max wheel) until the MV is a few fps above the desired value...
...Shoot 5 shots... get MV... adjust...
shoot several shots to allow the gun to "settle in."
(This adjustment gives the best
HS pressure to the projectile.)
5. Now adjust the Micro adjustment until the MV is on the desired value.
...Shoot 5 shots... get MV... adjust...
(This adjustment gives fine
tuning of the HS tension.)
6. Close Valve adjuster (turn it in) until you notice it just starting to shave off
the last couple of fps ... you want to end up at the desired fps for projectile.
...Shoot 5 shots... get MV... adjust...
As adjustments are made, the MV will stay about the same until there is a definite drop. Set the valve at the position just before the drop.
Close the valve adjuster only 1/8
turn at a time.... very precise.
( The valve adjuster regulates the
time the air port is open. By
adjusting it down... turning valve
in and finding the MV decrease....
you adjust the airflow to stop
just as the projectile exits the
barrel. This ensures the projectile
exits the barrel without deviation
of flight from too much airflow.)
7. Adjust 1st reg pressure to 30 bar above the 2nd reg. pressure. The gun must be degassed to make this adjustment. Take the gas pressure canister off the gun to get to the 1st reg adjustment port.
( The ~30 bar pressure gradient
will protect the 2nd reg.)
8. ...Shoot 5 shots... get MV... ensure the MV has remained the same after all adjustments.
WRITE DOWN THE SETTINGS
9. Now the gun can be sighted in!
oncall-50
Upvote 0
semo4647...
If you go through the above process, you will get the precise tune for your personal gun & projectile. This can be done easily in an afternoon. Every gun has its own specific settings.
oncall-50
If you go through the above process, you will get the precise tune for your personal gun & projectile. This can be done easily in an afternoon. Every gun has its own specific settings.
oncall-50
Upvote 0
Upvote 0
I get sub MOA group at 70 yards with 32.5 presslug, here is my setting:
1st: 180
2ndL 150
16-4.75
valve 4
speed: 1000 fps
1st: 180
2ndL 150
16-4.75
valve 4
speed: 1000 fps
Upvote 0
Using the directions which I noted above..... here are my settings....
FX Impact M3 25 cal 600mm with tuner & moderator.....
My Slug Settings.....
Bullet. NSA/.25cal/33.5 gr
1st Reg...... 180 bar
2nd Reg..... 150 bar
Valve......... ring (10.81.mm)
Macro........ 8
Micro......... 3.5
B.Tunner.... 8
MV............. 955 ft/sec
oncall-50
FX Impact M3 25 cal 600mm with tuner & moderator.....
My Slug Settings.....
Bullet. NSA/.25cal/33.5 gr
1st Reg...... 180 bar
2nd Reg..... 150 bar
Valve......... ring (10.81.mm)
Macro........ 8
Micro......... 3.5
B.Tunner.... 8
MV............. 955 ft/sec
oncall-50
Upvote 0
So I had my M3 shooting well with 25.5 gr. Zan slugs in .218 at 995FPS, Second regulator at 109 bar, valve open wide, & hammer spring adjusted to give near maximum velocity. I found that they were doing a little better than the Nielsen 24.8 grain and had multiple MOA groups at 100 yards.
I felt too close to the FPS maximum at this reg setting so I turned 2nd reg up to 119 bar. Adjusting the hammer spring to previous velocities produced poor results. The NSA slugs were then grouping better and the Zan’s much worse. Velocities for best group results were lower for both. Also JSB Monster Redesign 25.39 gr. that were working very well at 970 now wanted 950 fps.
Using the same rifle, have others found that the velocity that produces best results for a particular projectile is different at various regulator settings?
I felt too close to the FPS maximum at this reg setting so I turned 2nd reg up to 119 bar. Adjusting the hammer spring to previous velocities produced poor results. The NSA slugs were then grouping better and the Zan’s much worse. Velocities for best group results were lower for both. Also JSB Monster Redesign 25.39 gr. that were working very well at 970 now wanted 950 fps.
Using the same rifle, have others found that the velocity that produces best results for a particular projectile is different at various regulator settings?
Upvote 0