Tuning Derek Wall's Cricket .22

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wyshadow

wyshadow

Member
May 11, 2015
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Las Cruces, New Mexico, United States
Derek ported the valve and polished the barrel and set this gun up to shoot the 25.39 JSB redesign monsters to a speed of 880 fps. Derek told me I could increase the reg pressure and hammer spring higher if I wanted more power. After reading through several other people shooting NSA slugs through their crickets, I decided to give it a shot. I know to give me the best shot at accuracy for slugs, I need to push the speeds a lot higher for pellets because I've read the slugs have more resistance in the barrel. I increased the reg to 135 bar and test, 140 bar and test, 145 bar and test.

I settled on the reg at 145 bar and this is what my end result:

40 shots 250 bar to 140 bar

Hi - 911 ES - 7

Lo - 904 SD - 1

AV - 908 Energy - 46.5 ft-lbs

Max speed I was able to achieve was 922 fps 47.94 ft-lbs but the hammer was almost max out.



I tested out the cricket this evening at 50 yards in 5 to 8 mph winds

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Two groups with 2 shots

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I ordered the several samples packages from NSA in 17.5 and 20.2 grains. I do have some heavier NSA slugs and will test them tomorrow. It will be hard for the NSA slugs to beat the JSB pellets. I was able to get 8/10 shots 1/2 inch group.

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Super shooting as may be expected from the cricket with a skilled boss 😉

I believe the 20.2 will go quit a bit faster with this setting. Expect speed towards 940 at least wich might be fine . It will be a amatter of fine tuning for equal groups. I look very much forward to see how your barrel will deal with the NSA’s . When do you expect to receive them and test ?
 
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Interested in where this thread goes. My Cricket II from Charlie will do around 40-42 fpe on his tune. I've tried the 17.5 and 20.2 in .2165 and .216 and I didn't have much luck. I don't think I pushed speeds up to 950 fps though, so I'll give that a try with the 17.5 - I don't think it will get the NSA 20.2 up over 900.

I haven't pushed the slug envelope in my Cricket as I wasn't really going for a slug build with this gun. It shoots the JSB 18.1 and the H&N 21gr Barracuda Match like lasers around 900 fps. 
 
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Interested in where this thread goes. My Cricket II from Charlie will do around 40-42 fpe on his tune. I've tried the 17.5 and 20.2 in .2165 and .216 and I didn't have much luck. I don't think I pushed speeds up to 950 fps though, so I'll give that a try with the 17.5 - I don't think it will get the NSA 20.2 up over 900.

I haven't pushed the slug envelope in my Cricket as I wasn't really going for a slug build with this gun. It shoots the JSB 18.1 and the H&N 21gr Barracuda Match like lasers around 900 fps.
Click to expand...

Reg setting ?
 
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