power increase needed in a HW

[darren m]

can any one help me out , got this HW95 stripped it and put a new HW piston seal in , every thing else looks alright , but the power is still low , the spring is an SFS jobbie it looks fine but might be a bit weak .
At the moment the gun is doing 10.6ftlbs , and i would like to get it up to 11.5ftlbs.
i looking for some washers that slip behind the piston ( i think ),i ve been to the local gunshop and he does'nt have any .
And not sure exactly what they look like either.
As anyone got a few lying around 2 or 3 would do it , would be real greatfull .
THANKS
Darren .
ps . its for an HW95 in .22 cal , by the way

[Rustam Bana]

You could ask Venom or SFS to send you a few.

Would have sent a few I had made in brass but these are for a '80 and may not fit.

BTW, the washers go ahead of the top hat (front spring guide).

Rustam

P.S.: Since it's a new spring and washer, wait for 500 or 1000 shots before using pre-load washers. These may not be needed.

[darren m]

Hi Rustam -- its had a whole tin of superdomes plus a few more and the power has'nt budged.
i 'm not sure about the position of the washers , i was told that they are to go on the back of the piston ( slide over the piston rod) , is this wrong ???
we've got to get on with thining the rabbits around the horse paddocks , so this airrifle is really needed right now ( shotguns are a no , no because of noise levels ).
Does any one have a few they could spare me , where exactley do i put these washers , i'm confused ..

Thanks
Darren ..
can i get the same size washer at a diy place or are we talking about a totally different kind of washer

[Hotshotharv]

Personally I'd get SFS to tune it for you, they did my HW95 for £45, it shoots superbly at a consistent 11.7 ft lbs with superdomes (.177 ) I'd reccomend it.

[Rustam Bana]

Originally posted by darren m
is this wrong ???

No. I misundertsood. When you said 'behind', I initially thought you meant the rear piston guide.

Definitely try a DIY store but take the piston along.

According to my calipers, the Venom washers are 1.15mm thick, have an OD of 20.57mm and an ID of 10.66mm.

Rustam

[Bulsaye]

std. 10mm washers fit just fine and come in a few thicknesses. Start with one or two that are approx 1.5mm thick. RB