Tuning IMPACT M3 COMPACT .25cal 500mm tune suggestions?

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jerrymail

jerrymail

Member
May 29, 2020
377
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South California, United States
Need tune suggestions for my M3 Compact .25 500mm.

The stock setting was 1st reg 145bar，2nd reg 118bar(replace digital gauge), valve knob at 4th line(almost touching the shroud, can't open more), Macro power wheel at #16 and Micro adjuster at 3.5. Shooting FX hybrid slugs with FX chrony results: 

Shot count: 29

Low: 895 Hi: 914 Avg: 908

Spread: 19 STD Dev: 4.3

I know the FX hybrid slugs like higher velocity, maybe 965fps? What velocity you recommend to achieve for M3 Compact？What kind of reg pressure and quick tune settings you suggest? Any tips for M3 Compact tuning? Thank you for help!
 
Tuning should be about the same as mk2. Changes in regulators should tighten up spread. Their great while they work. Sadly I've owned several mk1,mk2, and already mk3 in .22 and .30, neither lasted without some issue longer then a few weeks and then got returned. Really wish they'd make them with higher quality parts. Love the overall feel and size and magazine size etc. 
 
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I’ve never had any luck with exceptional accuracy with a .25 Hybrid over 940fps out of my 600mm superior. Need more barrel length if I want to shoot them faster. I will emphasize this is as good or better than pellet accuracy with a proper tune. I can get them going almost 1,000fps but that’s max hammer spring and valve wide open. That’s not a good place to be. You can get your gun to produce some impressive numbers but I wouldn’t expect great accuracy from a complete fill to refill. If I had a 500mm barrel, I would shoot for a 900fps Hybrid tune. Trust me, they don’t need to go fast. I had an insanely accurate 100yrd tune at 850fps.
 
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Tuning should be about the same as mk2. Changes in regulators should tighten up spread. Their great while they work. Sadly I've owned several mk1,mk2, and already mk3 in .22 and .30, neither lasted without some issue longer then a few weeks and then got returned. Really wish they'd make them with higher quality parts. Love the overall feel and size and magazine size etc.
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Sorry to heard that. My MKII .30 sniper was leaking when I received, so I sent it for warranty, then luckily upgraded and tuned by Ernest himself. So I actually never tuned impact by myself. Now I just start to learn how to tune my M3 .25 compact. Is there any detail tuning video? Thank you.


 
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I’ve never had any luck with exceptional accuracy with a .25 Hybrid over 940fps out of my 600mm superior. Need more barrel length if I want to shoot them faster. I will emphasize this is as good or better than pellet accuracy with a proper tune. I can get them going almost 1,000fps but that’s max hammer spring and valve wide open. That’s not a good place to be. You can get your gun to produce some impressive numbers but I wouldn’t expect great accuracy from a complete fill to refill. If I had a 500mm barrel, I would shoot for a 900fps Hybrid tune. Trust me, they don’t need to go fast. I had an insanely accurate 100yrd tune at 850fps.
Click to expand...

Thank you for sharing. I increase 1st reg 175bar, 2nd Reg 145bar. Shooting 988~1018fps with power wheel and Micro adjuster all max out, valve over 4th line. But the 1st reg doesn't work property. The pressure just recover slow after every shoot. I will try to increase 1st reg washers and change stacking. If it not work, I will try to lower reg until get a more consistent velocity.
 
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