Scope question on HW80

[shahid]

Here's a pic of my HW 80 mounted with a Nikko Sterling AO Scope.

I have shimmed the rear ring with 2 layers of photo film 9 negative ) because it was shooting low initially.

However the scope does not hold to the vicious recoil of the HW 80. After about every 100 shots the scope travles back. It is mounted on a single piece mount, which is steady, i.e. does not travel at all.

Any ideas on how to arrest this scope tube travel ?

[dev]

Okay the clean way to do it would be to buy a scope stop. Its like a half scope mount that screws into the scope rail from the top and sides. Known manufacturers are Gamo and another name I can't recall at the moment.

Another jugaad/ improv method is Araldite on the scope between the rings and the scope but the scope's looks will be done for.
This will work but I think route one would be better.

Nice scope and rifle combo though is this what is known as the Beeman R 9?

Dev

[shahid]

No its not a beeman mount it is a Nikko Sterling mount with a elevation adjustment screw.

My problem is not the scope mount moving, I have plenty of Gamo / Diana scope arrestors. It is the scope moving back in the rings.

[Mack The Knife]

Dev is refering to the rifle.

Dev, the HW80 is called the Beeman R1 in the U.S.. The R9 is a HW95.

Mack The Knife

[Hunter]

Hi Shahid,
I too faced the same problem a while back and it got solved by using fine rubber shims inside of the rings!The same was cut out from rubber flip-flops as they are know nowadays(Chappals in India!)

[shahid]

Will there be enough space inside the ring for such a shimming with rubber ? Got a pic of what you have done ?

Never knew that Beman sell Werauch rifles in US. They sell H & N pellets too as beeman. In fact a product called Beeman Crow magnum is pretty legendary for Magnum Powered Air Rifles.

http://www.beeman.com/r1.htm

Here's the link

A bit different from German made HW80 in stock design.

[Hunter]

Tell u what...take a shaving blade..the topaz variety!And then cut thin strips out of the inards of the straps,thats all! To show u this is have to dismantle the rings of my scope....but trust me it will work!

[Mack The Knife]

Any ideas on how to arrest this scope tube travel ?

The scope creep is quite possibly a result of the front mount not sitting flush on the scope tube.

To start with Nikko Stirling mounts aren't exactly the dogs dangly bits as far as mounts go. It is quite possible the mount rings need lapping. Assuming that isn't the case, the shims provided on the rear mount tips the scope tube down as a result of which the tube may not be flush and it is quite likely that the front mount will pinch the tube.

Since your mount has built-in elevation adjustment, I would suggest you use this feature to get a rough zero.

1) Remove the shims.

2) Take duct tape or similar and fold in half along its length so that it acts as a double sided tape.

3) Stick the tape to the scope tube at predetermined marks which will align exactly with the mount rings. Make sure you do not overlap the tape.

4) Top half of the scope rings must be tightened evenly so that the gaps between the top and bottom halves are the same on the right and left side.

5) Use the mount's elevation adjustment to get a rough zero before using up the adjustments on the scope.

Mack The Knife

[shahid]

Shimming the rear ring is necessary here, the mounts elevation adjustment at max level still shoots 1 inch low at 10 m.

I have been taking care on mounting the top half of rings very gradually and carefully tightning the screws with even pressure alternately.

I will check the front ring, a bit of lapping may help.

The mount ring has premounted tapes on its base to hold the scope, but apparently it is not enough.

[Mack The Knife]

In that case put a piece of tape (exactly one turn) on the part of the scope tube that aligns with the rear mount and put a couple of drops of Araldite (not a fast setting glue like Superglue) on the bottom part of the tape.

This should hold the scope in place and not mar the finish either.

Alternatively, try Clary's method.

Mack The Knife

[shahid]

And what about the shimming ? Place the 2 layers of photofilm below this tape ? I.e. between the tape and the scope ring base ?

[Mack The Knife]

And what about the shimming ?

Sorry, was talking out of my backside back there as I forgot your mount has reached the limit of it's adjustment.

I guess you will either have to use the shims or put more layers of tape. If you use the shims, I would suggest gluing them together so as to prevent slippage.
Just an idea but instead of photo film, how about trying sand paper + 1 layer of tape on the tube to protect it's finish. That's a gritty surface and you may not need to use an epoxy.

Mack The Knife

[shahid]

A good idea, can try that or a thin teflon sheet Available here, that too is a rough gritty surface and binds well on adhesion.

[Mack The Knife]

Okay, let us know how it goes.

Mack The Knife

[dev]

Dev is refering to the rifle.

Dev, the HW80 is called the Beeman R1 in the U.S.. The R9 is a HW95.

Mack The Knife

Thanks Rusty,

I am really loving these rifles and have been thumping targets with the HW 90, I love the way its decided to stay with me.

Regards,

DEV