Hw99 piston buttons

[gibboj]

hopefully if I do get it accurate tony it will be a nice rifle as thay have a lot going for them ,light ,short, nice looks, good trigger, full power now . I only bought it after seeing what all the fuss was about the Sandwell field sports imp was . I think im right in saying that HW had some issues a couple of years ago with some of there barrels not being machined right ? . it shoots good groups for 3-4 pellets at 35 yd then the next 2-3 pellets are 2 ins away from each other, strange ANY HELP APPRECIATED ?.a new barrel might be needed at this point
atb john

[rg627]

Cheers

Good point about removing metal. I saw someone do this on YouTube.

Shame about the barrel. Mines more accurate than I am. I find the hold sensitivity / inconsistent technique on my side and head position / parallex throws a group out for me. It clover leafs at 17 yards. In more skilled hands I'd imagine the groups would tigthen further.

Is the barrel locking consistently?

Did you use 6mm rod?

[TonyL]

hopefully if I do get it accurate tony it will be a nice rifle as thay have a lot going for them ,light ,short, nice looks, good trigger, full power now . I only bought it after seeing what all the fuss was about the Sandwell field sports imp was . I think im right in saying that HW had some issues a couple of years ago with some of there barrels not being machined right ? . it shoots good groups for 3-4 pellets at 35 yd then the next 2-3 pellets are 2 ins away from each other, strange ANY HELP APPRECIATED ?.a new barrel might be needed at this point
atb john

Is the barrel locking consistently?

I do seem to remember something about a bad batch of barrels on HWs, John. I could be wrong, but I seem to think that this only applied to some HW100s?

I have never felt the need, and don't know if you have done so already, but giving the barrel a thorough clean may help? And then some pellet testing.

And, as per the above post, yes, give the detent a lube and see if that helps.

[gibboj]

i used 4mm delrin rod on all my pistons , i think 6mm is a bit to big by the time you have three in . and the piston is easy to drill out it not hard steel .i drill a 3mm holes in the piston cut a 10mm piece of 4mm delrin rod put it in a drill and force it into the 3mm hole while applying pressure with the drill turning [ it melts the 4mm rod into the 3mm hole ] sounds a bit wearied but it work for me . back to my 99 barrel it never shoot good as a std lengh barrel so i chopped about 4 ins of it and fitted a barrel weight and recrowed it , still poor, cleaned the barrel 3-4 times , no better, tried all types of pellets when new all shoot the same , then made a piece of steel template put it in 6 tone press and rechoked the barrel again [if HW are choked as std ?] , still the same .iv just bought a 5.2mm reamer , the breach feels a bit tight on this barrel so im going to reamer it out and then lash the barrel on the inside , then a good clean again
atb john