Need help with my Chrony Numbers.

Doesn't look too horrible, what reg pressure are you running? What line is the valve adjuster on? What pellets?

I believe with the reg a bit higher, and the valve adjuster closed a bit you might get tighter numbers. Is the gun a stock mk1? Or upgraded with power plenum kit?

Numbers aren't that bad. What does the target tell you? 

Hi Patric

I don't see the count very badly. If you could go up to 900 fps little by little and testing groups as you go up, I think something would close the group

Regards

Enkey

Hi Patric

I don't see the count very badly. If you could go up to 900 fps little by little and testing groups as you go up, I think something would close the group

Regards

Enkey

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Hi Enkey



hm ok, for me it’s bad enough.

Thanks that’s a good idea, if the weather is well tomorrow I’ll try that. I thought I only try at that speed cause it’s recommended by so much Airgunners.



Regards

Patrick

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Hi Patric

It doesn't have to be 900 you see looking for the best group between 850-920 no 2 airguns are 100% the same

Regards

Enkey

I believe with the reg a bit higher, and the valve adjuster closed a bit you might get tighter numbers. Is the gun a stock mk1? Or upgraded with power plenum kit?

Click to expand...

IMHO Glem is right. Your numbers are all over the place because. Your hammer is hitting the valve way to hard. Causing it to near valve lock and bouncing back off the rubber ball. Causing the dwell to be shorter, unpredictable and erratic. If you bump up your regulator it but more back pressure behind the valve. Also possable take a very small amount off your hammer grub screw. With the these and and valve adjustment right your gun will shoot standard deviations of 2-3fps all day long. FYI adjust the valve adjustment out 1/8 of a turn until your fps stop building then turn it 1/16 of a turn until the is where your happy standard deviation. It take practice to get wright, so dont get mad if it take you a few try's to get right. 

Looking at your grouping at 77meters, I think your gun really like the 875 fps. Just clean up your standard deviation.

Thats more like it, nice work Patrick 

Nice job. That’s as good as it gets.