First semi-serious target shooting the oldHW80K...

Pauly, from the fact that u fitted a reg into yours, is it safe to assume that the standard cyclone was not regulated?

Mark, those r good figures and a nice versatile rifle.
If it is regulated it will keep those figures from the maximum fill pressure, which is probably around 200 or 230bar, all the way down to where the reg is set, maybe around 100ish bar? (just a guess).

If it is not regulated you will need to work out the “sweet spot”, which is where the rifle performs most consistently as the pressure drops. Just as an example this might be from 190bar down to 130 bar. Once you have worked out where the sweet spot is, there will be no point filling it up to more than 190bar, and you will know that when u get to 130 it’s time to refill.

If it were mine I would use it as follows:
With an 8.44gr pellet 670fps is giving 8.4FPE, which is perfect for plinking at home as well as rats mice, small birds up to dove and myna. Could also do close range head shots on rabbits if you are confident with your accuracy. Usable distance is subjective and depends on your confidence and the accuracy of the pellet, rifle and shooter combo, but out to around 20ish yards would be fine for hunting/pesting. If u r just shooting at fans or spinners, then as far as u want.
At 820fps you are getting 12.6FPE and I would use that for all the above plus pigeons and rabbits, out to 50 or 60yards, assuming accuracy is there.
At 900fps you are getting 15.2FPE which is overkill for the small stuff (but still works of course) and I would use it for everything up to possum size pests, again at distances you are comfortable with.

Pete,
My Chinese chrono gave me the following fps from the Cyclone with about 135 bar with the 8.44 Gr Diablos - fps is an average of 2 but I think down from that pressure power is dropping away quite quickly so fps likely to be very approximate:



Edited by JasonEdward - 13 Oct 2024 at 10:17pm

Thanks guys,
I have some Baracudas in 177 (10.65 gr), and yes, have only shot at low power in the back yard so far.  

Any idea at what pressure it's wise to fill the tank to keep accuracy? The rifle had in it and is down to about 150 bar now maybe 30 shots later. I got the Scuba fittings from Ron so no problem there but those who have had a Cyclone likely have some useful info...there does not seem to be a lot online re the Cyclones, but enough I was happy with Paul's recommendation to buy it. 

So far, it's absolutely living up to expectation and I'd expect to do a little better more relaxed but that trigger is set way way lighter than anything I've used before and I'll adjust it for sure because a stray finger would easily fire it at the moment and I've before never had a rifle I worry about accidentally firing due to what I'd call a hair trigger. But easily fixed...

Also the zero recoil is amazing; the first time I fired it when I got home in darkness only the wee "ping" let me know it had fired...I had to have another shot to make sure and I definitely killed one of my carport supports.

Looks deadly to me.
Have no dought that grouping will shrink with familiarity.
There's no comparison to a springer, pcp are way better and as you say has the mag.
Looking forward to seeing a few pics and review at some stage.

I have some drawings for making a shooting bench. It can be made from one sheet of 18 mm ply and can be collapsed for storage. So maybe a bench and I find it good having a small bean back supporting my front hand holding the gun.