TX200 HC power reduction?

[Bosun]

My TX200 HC is getting a little too near the legal limit for my liking at 11.72ftlb.

OK, simple enough I though, just remove some pre-load. The trouble is, there are no pre-load washers. What would be the effect of reducing the length of the piston weight? I know that reducing the spring length is another option, but I'm not too confident at doing it.

On the subject of the piston weight. Why is it a separate piece? Why isn't the additional weight part of the piston?

[gary martin]

reduced power, less preload placed on spring and reduced piston weight. a drastic action to take. i am guessing that a replacement spring has been used, and not shortened. is it close to the limit, or even a little warm? or just want a reduction in power?
piston weight, can be tuned to different spring, transfer port dimensions etc. if part of piston, requires machining.

[Bosun]

Hi Gary,

The spring is what came in the rifle from new (with polished ends), and as stated above, muzzle energy is 11.72ftlb with 8.4 grain AA pellets.

[gary martin]

as std, you could have anything up to five preload washers, may be yours is very efficient. if you are concerned, contact Air Arms, i don't think that they would send a rifle so close to the limit, but they can help.

[Blackbaronfish]

Collapse a coil

BBF

[Bosun]

Collapse a coil

BBF

Yes, I considered that, but I'm not confident that I wouldn't end up cocking it up. There seem to be several thoughts on how to do it.

[gary martin]

heat it up, use the spring guide to keep it straight.

[Blackbaronfish]

https://www.youtube.com/watch?v=FguFuLNKVQA

BBF

[Blackbaronfish]

And this is how Davy does it.
https://www.youtube.com/watch?v=Dk2Sw1m3kCw

BBF

[Sake-san]

It really is very straightforward but, if you are still concerned (and I understand that) try just leaving it cocked for a few days, just remember it is cocked when you come back to it!.