AirGunTech: Re Engineering Spring Powered Air Rifles for smoothness, consistency, and to better suit UK power levels.

HW85 part 5, final machining and bluing

The 85 has gone back to its owner now, he seems pleased 😉 I forgot to add the last update so here goes.

here we have the piston rear bearing now machined down. the lip was also removed at the rear where the recess is for the screws for the scope rail, this was so there was nothing in the way thru could foul on 😉

All that was left was to size the piston seal and set the power on the rifle, I set all rifles I work on to 11FPE with the most effcient pellet i find, they shoot nicer here, they kill just as effciently here (if you hunt) and they are safely below the 12FPE limit for the UK.

One last point i must stress, fitting a monster mainspring will kill your gun, here is what can happen to the cocking levers.




  Note the bend in it, this rifle came to me massively over sprung, the damage is clear to see, with a cocking lever this bent the rifle would drop the lever when cocked (it would come right out of the cocking shoe) and the breech on the barrel was touching the underside of the stock as the stroke length had increased due to the bend.

ONLY fit springs that just deliver the power you need, massively over springing guns does nothing but damage them….luckily this one was easy to straighten again.

Now straight:

Please keep an eye on this if you pick up an old rifle to refurb, a bent cocking lever renders the rifle dangerous to use 😉

So, all that was left was to pack the bits up for bluing and drop them off with Colin Malloy. Colin does some amazing bluing, he is able to bring old rifles back from the bring of death and have them looking like new, infact in many cases better than new. Here are a couple of pics of the action, I did not have time to get well lit daylight shots for this one but will for the HW80 he is bluing now…these should show what good work he does though. You should notice I have used the larger HW80 barrel breech shims, you should just see one poking out between the breech and barrel, the reason for this is the previous owner had not looked after the rifle and used the gun with totally worn away shims, the side of the barrel was heavily scared by this and no amount of polishing would have removed all the damage…so I decided a larger shim would help spread the load better and is actually not see when in the stock at all.




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