Trying to set up Chairgun for my .25 Gauntlet- does anyone have the BC of the 25.39 & 33,95 JSB's
BC of JSB 25.39
- Thread starter be4meliz
- Start date
Those pellets are pre populated in Chairgun. I show 0.0360 for BC for the 25.39. Click on "projectiles".
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I can bring my chrono over if you want to calculate bc. Strelok pro hasn’t let me down yet.
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The BC changes depending on your rifle/barrel, velocity, range (velocity related) and environmental conditions.
Here is a graph derived from actual average velocity figures over 50, 100, and 200 yards which I researched when the Kings first came out some 9 or 10 yrs ago. The best fit line interpolation and extrapolation shows what you may expect and according to the criteria mentioned in pg 1.
Note that in one respondent's figures above, the bc was taken at an mv similar to my figure figure shown at 150 yards and the bc is similar when actual velocity is matched.
Yes, the chronograph was shielded at the longer ranges and a protected spotter (thanks Rrob ) recorded the results.
You might get something from this. Kind regards, Harry.
Here is a graph derived from actual average velocity figures over 50, 100, and 200 yards which I researched when the Kings first came out some 9 or 10 yrs ago. The best fit line interpolation and extrapolation shows what you may expect and according to the criteria mentioned in pg 1.
Note that in one respondent's figures above, the bc was taken at an mv similar to my figure figure shown at 150 yards and the bc is similar when actual velocity is matched.
Yes, the chronograph was shielded at the longer ranges and a protected spotter (thanks Rrob ) recorded the results.
You might get something from this. Kind regards, Harry.
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Thanks to all for info- just downloaded Strelok also, so lots of info to input to stretch out to 100-150
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