Need analysis of Top Hat adjustments, please
Date 10/16/2009 Temperature 40 degree F
Condor .22 cal. 24” Air – start 2800 psi, ending 1750 psi
Eun Jin 28.4 gr rated, Actual average 29.0 grain
38 short, all recorded
Shot #…………..fps Top Hat
01……………….961.9…………….0.070”
02……………….907.6…………….0.070”
03……………….891.0…………….0.070”
04……………….838.4…………….0.077”
05……………….938.6…………….0.077”
06……………….946.4…………….0.077”
07……………….918.6…………….0.080”
08…………….1,216……………….0.080”
09……………….969.2…………….0.080”
10……………….979.9…………….0.080”
11……………….938.2…………….0.081”
12……………….966.0…………….0.081”
13……………….963.1…………….0.081”
14……………….973.9…………….0.081”
15……………….956.8…………….0.082”
16……………….974.6…………….0.082”
17……………….999.2…………….0.082”
18……………….973.7…………….0.082”
19……………….970.2…………….0.084”
20……………….974.6…………….0.084”
21……………….967.2…………….0.084”
22……………….963.8…………….0.086”
23……………….955.8…………….0.086”
24……………….964.8…………….0.086”
25…………….1,099……………….0.088”
26…………….1,101……………….0.088”
27…………….1,116……………….0.088”
28…………….1,068……………….0.088”
29……………….913.6…………….0.089”
30……………….912.0…………….0.089”
31……………….929.3…………….0.089”
32……………….921.4…………….0.089”
33……………….904.7…………….0.087”
34……………….902.2…………….0.087”
35……………….909.0…………….0.087”
36……………….865.5…………….0.088”
37……………….850.0…………….0.088”
38……………….816.5…………….0.088”
Well, I left it a 0.088” but I’m not sure why that didn’t show better than the 0.087” setting?
What do I do now? Should I repeat the Top Hat adjustments with a consistent 0.002” change? Or, can I go on to a refill and look for a bell curve?
All Replies
you need to fill your tank a bit more often to keep it running through it’s prime bell curve to get a true reading of what is going on with the adjustments, try every 10 or 15 shots at the same setting , fill tank to the same as before, adjust top hat, and repeat ’till you find your guns sweet spot.
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Make sure all pellets are the same weight and seated exactly the same depth if you want the numbers a close as possible.
As for me, once the gun is at the approximate velocity I want I put away the chrono and shoot for groups.
I count the number of shots and see when the POI changes. Then lets say I know I have 40 consistent POI shots. Then for the next 20 or so I AM A LITTLE HIGHER.
Then I go refill 😀