Softer HW99 Mainspring?

[Shed tuner]

I run mine with a longer, softer spring. Nicer, softer firing cycle, easier cocking, and less piston bounce.. power is actually unchanged at just over 11 (in .177)

[Phil Russell]

I run mine with a longer, softer spring. Nicer, softer firing cycle, easier cocking, and less piston bounce.. power is actually unchanged at just over 11 (in .177)

Excellent, but do you know which rifle that spring was original equipt for?
Cheers, Phil

[p.j.]

I remember talking to Shauny about this and he finds a Titan meteor spring (cant remember the number), works well in these. Probably need a piston sleeve as likely be of smaller diameter.

[Shed tuner]

Excellent, but do you know which rifle that spring was original equipt for?
Cheers, Phil

err, well.... it was the 4th one I found in the second drawer of my cantilever toolbox full of springs...

[p.j.]

Ah yes I know that spring

[Phil Russell]

err, well.... it was the 4th one I found in the second drawer of my cantilever toolbox full of springs...

Now there is a man after my own heart ......
Cheers, Phil

[PhatMan]

Bill,

I fitted a 0.22" Wonky Donky service kit into my 0.177" HW99S, and it made ca. 10.0 ft.lb, with no compression washers fitted.

Lovely to shoot, and much easier to cock that when the rifle is at ca. 11 ft.lb.

Compare the trajectories of 10 ft.lb, and 11.5 ft.lb in Chairgun, and you see you are losing virtually no trajectory with 10 ft.lb

Have fun

Best regards

Russ

[Frog]

Shortening a spring increases stiffness so not the ideal way to go. If Konceptus starts trading again their springs are very nice - softer than standard. My Konceptus kitted 99 is excellent.

For a meteor spring use an early mark of meteor and original equipment...

[maximus]

Titan meteor spring is no. 5. I have used these in some guns but wouldn't say they were particularly soft. The spring in my HW50 is an old one out of my 22 95. Produces 11 in 22. TX mk3 springs are quite weedy so may be worth a look to see if they would fit.

[TonyL]

Bill,

I fitted a 0.22" Wonky Donky service kit into my 0.177" HW99S, and it made ca. 10.0 ft.lb, with no compression washers fitted.

Lovely to shoot, and much easier to cock that when the rifle is at ca. 11 ft.lb.

Russ

Very nice to know, Russ.

Thank you.