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Shifting POI

Daystate Air Ranger an Air Ranger 80 Designed to be a ‘supergun’ amongst sporting air rifles, the Air Ranger and its extra-high power stablemate, the Air Ranger 80, bring a whole new dimension to mechanically-driven PCPs. Now you can shoot well beyond your normal limits.

Shifting POI

Postby Stefan » 11 Apr 2015, 21:02

Did you have issue like this?
My ranger is spot on on 50 meters, on lets say 220 bar, but then when the pressure goes down, my POI changes. I couldn't find a pattern.
I don't have a chrony at the moment, could it be that my speed is changing? Its a non regulated model, 2 years old.
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Re: Shifting POI

Postby Stefan » 21 Apr 2015, 08:30

I did chrony it for weekend. At 230 bar I had a 790 fps reading and around. when I got to 200 bar it spiked over 800, and for more than a few shots it went over that mark, even to 818 fps.
I reduced hammer strength, and set it to 750 fps at 190 bar and below. Still have to charge it back to over 230 and see the speeds in that pressure range. I wish I could set it back to just below 12 ft/lbs on full pressure range. Is that possible?
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Re: Shifting POI

Postby stryder5 » 21 Apr 2015, 13:19

You are searching for your sweet spot on an unregulated gun, try 190 bar start should then be consistent down to around 100bar.

These figures are guesstimates but shouldn't be far out, you are wasting air charging to 230 bar.
Dream each night you will live forever, live each day as though you'll die today.

"The difference between stupidity and genius is that genius has its limits. "
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Re: Shifting POI

Postby Stefan » 22 Apr 2015, 12:32

thanks. I thought that this slingshot hammer can sort of a regulate my daystate, but then again, there are a lot of shots from 190-100 bar
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Re: Shifting POI

Postby stryder5 » 22 Apr 2015, 13:31

Slingshot hammer is not a regulator, it is a method of air conservation, reducing valve bounce.
Dream each night you will live forever, live each day as though you'll die today.

"The difference between stupidity and genius is that genius has its limits. "
Albert Einstein
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Re: Shifting POI

Postby Peststopper » 30 Jun 2017, 10:22

I changed from a ranger to a wolf for POI reasons. Mine was a 60 ft lb running 29 grainers at around 930 fps. The air pressure gauge is to inaccurate I think on the rangers to know when your drop off will come. My wolf is regulated and exact pressure is displayed which you can see fall from shot to shot. It's the 40 Ft lb one running 18.1 jsb at around 870 fps. A far better gun than the ranger in my view, I shall not be going back. I now am in the mind that over 40 Ft lb in an airrifle is much more expensive than rimfire which I did go too eventually.
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