Tuning Tuning FX M3 for .30 44.75 JSB

[F6Hawk]

I'm not shooting for competition here, just trying to get a legit starting point for tuning my .30 M3 with 600mm barrel and @DonnyFL Sumo with JSB 44.75.

I will sight in at 30 yds, but 90% of shots will be less, 8% will be at 30, and maybe 2% will be at 50 yds. Primary goal is small, repeatable groups, with air conservation a second desire.

I have seen all sorts of FPS out there from 830-920. Obviously, lower FPS saves on air, but if anyone has dialed in tight group with this rifle using these pellets for me to use as a starting point, I would appreciate your M3 settings.

The gun was handed to me with the following settings, which I have not had time to play with yet, but next week I'll start playing with them using the FX True Ballistics chrono:

1st - 145 bar
2nd - 105 bar
Wheels - 11-4-6
VA - Around 5 or 5.5 (hard to tell)

As reported at time of tuning:

Is this about as good as it gets with the .30, or has anyone come up with a better tune?

 

[Chukar60]

That is pretty good right there. Not too sure what else you would expect.
If you are of a mind to tinker, follow this formula for tuning.

How to set up FX IMPACT M3

HOW TO SET UP YOUR FX IMPACT M3 FOR BEST MV & ACCURACY....... To get best MV..... try.... ...PROCESS TO FOLLOW... 1. Open all adjustments.... Valve adjuster max... all the way out ....5+ rings HS (Hammer Spring) mid...

www.airgunnation.com

That is a simple straight forward guide for tuning an M3 and is much faster than jumping from one provided tune to the next.

 

[JaceSpace1369]

I'm not shooting for competition here, just trying to get a legit starting point for tuning my .30 M3 with 600mm barrel and @DonnyFL Sumo with JSB 44.75.

I will sight in at 30 yds, but 90% of shots will be less, 8% will be at 30, and maybe 2% will be at 50 yds. Primary goal is small, repeatable groups, with air conservation a second desire.

I have seen all sorts of FPS out there from 830-920. Obviously, lower FPS saves on air, but if anyone has dialed in tight group with this rifle using these pellets for me to use as a starting point, I would appreciate your M3 settings.

The gun was handed to me with the following settings, which I have not had time to play with yet, but next week I'll start playing with them using the FX True Ballistics chrono:

1st - 145 bar
2nd - 105 bar
Wheels - 11-4-6
VA - Around 5 or 5.5 (hard to tell)

As reported at time of tuning:

View attachment 440357

View attachment 440358


Is this about as good as it gets with the .30, or has anyone come up with a better tune?

Not be rude or anything, but what more are you expecting at said distance? Youre group is less than a .25" with a .30" pellet at 30yds.

Typically the 44.75gr like going 860-870fps. The best thing for you to do is test it at 50yds, not all guns or regs are created equal. But I would say that's a damn tight group.

 

[Trucker3573]

Yeah I wouldn’t touch a thing. I have my mk2 set close to yours. 107-108 bar reg shooting 44.75 mid 870’s to mid 880’s. Outstanding accuracy

 

[F6Hawk]

Thanks fellas. Sounds like there is no need to tinker then, thanks for saving me time chasing my own tail. That's why I asked. Wondering if there were any gains in accuracy to be had aside from more energy and more air usage if I upped the FPS.