Hi there all i got a question i buy impact m3 sniper (700mm)barrel waiting it to arrive but i saw much videos that need to be tune can someone give good tune fir standard 700mm barrel for these slugs i think i cant shoot heavyer with standard barrel
FX Fx impact m3
- Thread starter EvilHere
- Start date
I have shot the H&N 27gr HP2s from my M3 600mm at 960-70fps with good accuracy, reg 2nd 135bar 16 macro 4 micro and 4.5 lines on the valve adjuster. All stock equipment.
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I have m3 700mm in 22. You may need a slug tuning kit or tungsten hammer, you may not need to either but I put one in my gun and it's a pain so it's staying. I'm using slug probe, slug transfer port tungsten hammer and stock springs.... shooting 23 slugs and 25 pellets on power wheel 1, max power wheel is for 34 grain slugs. 25 grain is somewhere in the wheel 5 or 6 area
2nd reg 140 bar
Micro adjuster set at 2
Valve adjuster is at the 4th line out.
This is just to get you close. You will need a chrono, too much hammer or valve and you'll be wasting air and making noise and potentially destabilizing the slug on muzzle exit. I'm happy to help if you need any more of my experiences. Very little of my m3 is stock anymore.
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I will get slug power kit but for beginning i will shoot full stock just will try to adjust for 23 255 2u grain slugs everyone says that stock is best for maxinum on 23 25 grain slugs im totaly newbie first gun
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Plenum pressure closes valves, valves need to be hit harder or kept open longer in turn to increase power. That's where the slug power kit comes in(if you need it) . 130 bar might get you to where you want to go. There's a balanced dance to how the gun performs "best". Youll pick up on it. Also slugs will drag more in the barrel. If the south africans got you here, they'll mention tunes.
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I don’t think you need a slug power kit to shoot 25 grains out of a 700 mm M3. I’ve gotten them to go over 1030 ft./s with the stock rifle, and that’s without even running the regulator terribly high.
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It's been a long time since I hammer swapped mine and I don't remember what it was capable of stock. After a slug liner things got weird and dialed up.
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There's 2 schools of thought sort of on hammers and the dwell curve of a slow heavy hammer and that of a fast light one. It's preference. I liked to find a tune that let me run 23gr on bottom and 34gr on top. At least in my situation hammer weight did a better job than spring rate at giving me a new performance window when my reg pressures were high and being used to close the valve as well.
Alas, it's 25 grains and you guys have a really solid point. I get too carried away and I don't remember what a stock hammer was in each version of the gun and what it could do at 130 bar. Obviously (or maybe not) You ease into seeing what the gun can do before you replace deep internal parts.
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