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  1. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    Very nice ! Do you lube the slugs or are they straight out of the tin ?
  2. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    I got one of the H&N multi-packs of slugs a while back, and the 34gr ones seemed to group OK. They're the same weight as the King Heavy MkII's, and I'll see how they perform. I'm not going to bother with dozens of different sorts - I'll try what I already have and leave it at that...
  3. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    Thanks for all the input guys - I'm pretty much there now - alas I've run out of pellets over the weekend... As Greenbeans alluded to, I was simply over-thinking things - especially with respect to the Micro and Macro adjustments. It turns out my VA will be over 4 lines at the sweet spot - but...
  4. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    Hello again Guys, Kinda getting there now - solved one problem - the low muzzle velocity - but I now have another odd thing going on. I basically solved the initial low MV by, as you all suggested, playing with the micro and macro adjustments. So now I can easily reach 900+ fps with a wide...
  5. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    No, it's definitely not a sub-12. The 750 fps I can get to, with a 34gr pellet, corresponds to over 40 ft-lbs.
  6. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    A big thank you to everybody above who has helped me so far - it's pouring down here so I may not be able to do much today, but tomorrow I'm going to: - Reinstall the normal barrel, to try and eliminate the new slug liner as the problem - Start back at around 100bar 2nd Reg pressure / 16...
  7. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    Thanks - I'll give this a go. All the tutorials and posts indicated to me that adjusting the thumbturn micro knob was more about smoothing the action of the hammer once you were at / near your desired velocity. Might adjusting it a few clicks get me from 740 fps to 880 fps ?
  8. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    This was what I was trying to do - but I couldn't get to 102-3% of my target speed in the first place. It seems the gun just won't get there, which is odd because nobody in all the posts or tutorials I've read and watched even mention the possibility an M3 can't get to 800-900 fps. As I said...
  9. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    This is the odd thing - I can't get anywhere near 800 fps - which I thought a .25cal M3 should be able to do, without any modifications.
  10. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    It's a 700mm Superior slug liner. I'd have thought that most / all FX M3s were the same / similar out of the box. Unless there are lower power ones sold in the UK where I am ? But mine's on a Firearms Certificate, so I assume it's the same as all the other .25 cal M3s out there ?
  11. W

    FX FX Impact M3 - I Can't Tune It to Higher Velocities - Strange ???

    Hi there Guys - hope you're all well. I've attempted to tune my FX Impact M3 in .25 calibre, to shoot JSB King Heavy MkII 33.95gr pellets at what is considered to be their optimum velocity of around 880 fps or so. As I nudged up the 2nd Regulator in 10 bar increments, this is what I saw. (I...