Respringing a HW55T

[Rickenbacker]

Your own post # 7 on the mainspring data thread includes some VS springs Phil

Link: http://www.airgunbbs.com/showthread....ainspring+data

Would the "20.7 14.5 3.1 255 Versandhaus" likely be the export (12 FPE) spring?

[Phil Russell]

Your own post # 7 on the mainspring data thread includes some VS springs Phil

Link: http://www.airgunbbs.com/showthread....ainspring+data

Would the "20.7 14.5 3.1 255 Versandhaus" likely be the export (12 FPE) spring?

You may well be correct. But it comes to something when I cannot remember my own posts! Looking at the spec you quote it is that given for the 50 and 57, but as many springs lump the 50, 55 and 57 together this spec could well be the export version.
The 7.5J spring I had from Versandhaus was a little loose on the original spring guide (a typical early HW splayed steel tube) and while cocking was fine and smooth, returning the lever to rest gave a little lever rattle as the cocking link moved over spring coils. So today I made a new, synthetic, guide. It is a good sliding fit but takes very little effort to push into the spring. The lever rattle has now gone and, interestingly, I have gained about 25fps with Hobby pellets.

Cheers, Phil

[wonky donky]

Why Hobby? They can either give the highest reading for light weight pellets or the lowest!. It all depends on compression?.... In a HW99s I would say tune or take readings with RWS,.. but not all HW's Phill,.... Some would do better with Air Arms diablo Express or for papaer punching RWS R10, H&N Finale Match, JSB Match... or the lighter versions from RWS, JSB or H&N.

Too much is made from testing with Hobby because they are light......They are also tight, cheap & inconsistent, this may mean other pellets will give higher readings depending upon compression...Sorry but I feel I'm trying to teach my granny to suck eggs here, I feel the same when I reading some of Jims articles......sorry Jim, but it's true!

[Phil Russell]

Hi Wonky Donkey. I have no issues with your comments, thanks. But why not Hobby? I use those pellets because they are a relatively cheap flat head that I use for short range paper punching, plinking at short range and bell target at home. Yes, I could have used another make but I did not intend my tests to turn into an encyclopedia of what different pellet brands do. As it was, over several shots the difference between lowest and highest was 6fps.
In the end the HW55T is currently running around 600 fps with Hobby. Would that change with different pellets? Of course it will ... from experience I would expect around 570 with AA Field for instance. Others I could not predict, have not tried, and am not particularly interested. Now if I was fettling for a sub 12 rifle ... say 11.3, then other pellets would certainly come into the equation, but in those cases long range accuracy would be more important than chrono performance.

Now, time for supper: more eggs I guess.
Cheers, Phil