First semi-serious target shooting the oldHW80K...

Also cleaning the barrel my Gamo jungle break barrel was shooting awful after 250 shots a piece of weed eater cord and old cotton cloth cut into squares pulled though the barrel back to shooting well

Well, I just took it down from 95 bar to 60 in 4 mags. Quick shooting 4 mags meant quite loose groups but POI well, I felt hi power as expected, medium about the same, low power went left.

But 60 bar POI/Power/FPS little different from my last chrono with 135 bar which gave Ft/sec 673.8, 820.7, 896.2 with high power at 135 bar 896, today 907.

That 907 at say 80 bar simply cannot be too much under power at max 220 bar surely...and these are averages and now that my Chinese chrono friend has a cardboard coolie hat it is much more reliable.

I think I need a wider section for 50 m trials. 

But yeah, this is all pretty much a bit of fun. Next fill I'll get methodical and try to plot a power curve at High Power, then do Medium and low - if I can be bothered...now I need to do some dusk cruising to find some farmer's doors to knock on. I have already have one paddock in mind I've seen plenty of bunnies in a few years ago during mid-night manoeuvres....



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I can see a springer being a thing of the past.
That's great results.
Who can complain about taking that sort of shot capabolity into the field.
Don't know if its any use to you but page 87 of you got to be out there too see, Pauly drew up a graph of the power curve of a pcp pistol I was playing with.
Could be something worth doing with yours if you haven't.

She still shoots on with accuracy!

Just 95 bar left! Yeah time to fill her up but I am VERY surprised she still shoots consistently...
Using high power so maybe that makes her wrestle every last bit of performance from the tank.
I'll do a chrono at this low pressure and then fill her up for the first time - I must have had around 200 shots from the 180 or 90 bar she held when I bought her...
 

Interesting - just went out for a quick couple of mags.

I accidentally left the setting at highest of the 3 - which is where I left it after chrono last time out...after these 16 shots the gauge showed spot on 120 bar.

It is my first group at high power but air tank getting down - either the rifle likes this or I'm improving.

I do feel I'm holding on the bull better but...this is not yet convincing me that the FX C wants more air...I think I'll keep shooting this same tank of air until the groups turn to custard. 

 

Yes Pete, not regulated from factory.

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 - 14 Oct 2024 at 4:17pm