Hw90 scope killer

[kerrwaf]

Got abit of a problem unfortunately chaps. Every scope i have put on my
Hw90 has been rattled to the point where they have broken. I'm usinf a sportsmatch dampamount aswell and the scope which has recently broken was a simmons prohunter which are supposed to be recoil proof. This is now the third scope which i have sent back to uttings. I must be on their blacklist of bad customers
What scope do you recommend i try next? I dont want anything to expensive. It has to survive on a prototype (or thats what i think it is) at F.A.C level.

[baz]

The HW90 isnt available in FAC format here as far as I am aware which means yours is probably overpressurised without necessary FAC components leading to piston slam and a recoil that will render scopes useless

Baz

[Andyman]

I'd say your gun is at fault if it's gone through 3 scopes, get the gun checked out before you put another scope on.

[kerrwaf]

This gun has been modified alot by the previous owner have a look at this thread that was posted a while back
http://www.airgunbbs.com/forums/show...hlight=kerrwaf

[electric sheep]

Piston seal problems are often responsible for piston slam and high vibration, if it's over pumped it will be burning the seal.

[kerrwaf]

its been working fine with no notable ( i havent had it over a chrono though) loss in power for over a year now, so if it did have a problem it would have played up by now.

[electric sheep]

I would check the seal as it only takes a few minutes, if it's undersized it will eat scopes, if it's burned you need may need less pressure and or lube.

[kerrwaf]

sorry im not an expert. How do i check the seal?

[electric sheep]

Check Chambers web site for a parts diagram. If you are going to mess with the pressure you need a pump and connector. It's all pretty self explanatory. If you have a pump drop the pressure before removing ram otherwise it will be under high tension.