In this video, I will show you how to easily and successfully tune any airgun for the best accuracy and efficiency, using the FX Impact M3 as an example. This airgun tuning guide video tutorial will include teachings, demonstrations, and philosophy on how to go about tuning your airgun for great success. This airgun tuning guide video will also include instruction & demonstration on "how to adjust an airgun regulator," and "how to adjust an airgun hammer spring." Its detailed teachings on "how to tune an airgun" will apply to any airgun, air rifle, or pellet gun. Finally, this video air gun tuning guide will teach the different needs of the diabolo airgun pellet, the Redesign airgun pellet, and the airgun slug. Accuracy demonstrations validating the airgun tunes will take place at a distance of 50 yards, 120 yards, and 150 yards. These airgun tuning methods will apply to any airgun caliber (.177 .22 .25 .30 .35 etc).

Airgun Nation Forum FX Impact M3 Tune - RESOURCE thread;
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VIDEO OUTLINE:

Tuning = Accuracy - Velocity - Stability - Consistency - Efficiency - Harmonics - Power Output

What is Tuning?
"It's the process by which we adjust the gun into a state of harmony & accuracy for any ammo or weather conditions."
Why do we do it?
“We tune to control performance, so that we can achieve the best accuracy, stability, and efficiency no matter what.”
How do we go about it?
"With an organized approach, we search & test for system harmony (reg/hammer balance points) at an accurate velocity.”

Tuning = Adjust-Control-Search for Accuracy - Velocity - Stability - Consistency - Efficiency - Harmonics - Power Output

Parts you need to know;
Regulator - the regulator takes a varying air pressure and turns it into a steady one (hi to lo)
Valve - the valve takes the air pressure coming out of the regulator and turns it into a metered pulse.
Hammer - the hammer collides with the valve, briefly opening it.

Tuning Process;

1) pick a lower than what you've heard reg pressure to begin
2) back off the hammer spring, and slowly bring up the hammer tension until velocity stabilizes
(always better to work at the balance point & below… over causes hammer bounce & waste air)
3) stop, that balance point is the ideal velocity for that reg setting (not necessarily perfected yet)
4) test the velocity for accuracy & stability at a minimum of 50 yds
5) leverage the QTS system and small reg2 adjustments to hunt around for the best accuracy
6) search for further improvement by beginning to work the VA closed in very small increments
7) evaluate and repeat, while searching for the speed at which the projectile stabilizes and becomes accurate.
8) build a tune around the velocity which found you accuracy

** you're essentially choosing velocity with the regulator setting... the hammer spring adjustments and VA bring the rest of the system into harmony with your chosen reg setting.
** exhaust your refinement of the tune, THEN experiment with the VA to further enhance accuracy

Golden Rules of Tuning;
1) know the needs of your projectile (diabolo vs redesign vs slugs)
2) stability trumps accuracy (pellets can hook & wobble into one hole at 50 yards, then scatter by the time they get to 100).
3) speed trumps tune (a velocity that gets ya accuracy is more important than a tight ES & SD... the pros dial on the fly all the time… find the right speed then build a tune around it).
4) tune the reg with headroom for temperature swings (reg up a little high to take full advantage of the M3's QTS system on cold mornings & hot afternoons… it’s okay to sacrifice a few shots)
5) ammo matters… a lot (find the one the barrel likes and sort for reliable accuracy).

Key Things to Remember When Tuning;
1) let the reg be your velocity throttle, the hammer spring setting just brings the rest of the system into harmony with the reg
2) all you’re doing with tuning is balancing forces to a chosen velocity and trimming waste air
3) if you’re close on the tune and struggling, a tad more reg pressure can have a stabilizing effect on velocity… as can a tad more hammer tension
4) obsess over ES & SD not because of consistency but because the tightness indicates an efficient valve closing with minimum waste air behind the projectile
5) work slowly from low to high on the regs & hammer, it’s easy to evershoot the ideal
6) harmonics matter to accuracy… experiment with scope position, bipod position, different moderators, harmonic tuners, sleeves, barrel tensioners, etc..

1:14 - Parts You Need to Know
3:15 - What is Tuning, Why Do We Do It, How Do We Go About It?
4:36 - M3 Familiarization
9:02 - Steps to Easily & Successfully Tune
14:28 - Tuning Demonstration
22:50 - 12 Tunes & 6 Groups and Golden Rules of Tuning
36:23 - Key Things to Remember While Tuning
38:06 - 6 Pro Staff Interviews on Tuning Success

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