Can Someone Check My Math?

[Dinny]

I put this chart together using a free ballistic program from Berger Bullets. They don't calculate the number of clicks for a scope setting at the different ranges. So I edited it myself using my 12th grade education. This is the formula I used for determining clicks of elevation for long distance shots.


1click=1/4" at 100yds
1click=1/2" at 200yds
1click=3/4" at 300yds
1click=1" at 400yds


All the odd numbers are calculated by adding 1/16" to the number below them. Did I do this right?




DISCLAIMER: I'm well aware that nothing but actual shooting will determine the exact drop, but I don't plan to shoot anything but paper with this chart.




+----------------------------- Program Inputs ---------------------------------+
|                                                                              |
+---- Bullet Inputs -----+----Atmosphere Inputs ----+-------Sight Inputs ------+
| Caliber: 0.243 inches  | Temperature:  37 degrees | Sight Height: 1.3 inches |
| Weight: 58 grains     | Pressure: 29.90 inHg     | Zero Range: 100 yards    |
| G1 BC:  .250 lb/in^2   | Humidity:  26 %          | Look Angle:   0 degrees  |
| G1 Form Factor: 1.529  | Density: 0.07974 lb/ft^3 |                          |
| MZL Velocity:  3925 fps| Wind Speed: 10 mph       |                          |
|                        | Wind Direction: 3 O'clock|                          |
+------------------------+--------------------------+--------------------------+




+----------------------------- Program Output ---------------------------------+
       Range    Velocity    Energy     Trajectory         TOF          Clicks
      (yards)     (fps)     (ft-lb)     (inches)         (sec)                (+/-)
          0      3925        5405          -1.30         0.0000                 0
         25      3798        5060          -0.74         0.0194             +14
         50      3675        4737          -0.33         0.0395             +3
         75      3555        4434          -0.08         0.0603               0
        100      3439        4148           0.00         0.0817              0
        125      3326        3881          -0.11         0.1039              0
        150      3216        3629          -0.41         0.1268              0
        175      3109        3391          -0.92         0.1506            +2
        200      3005        3167          -1.66         0.1751            +3
        225      2903        2956          -2.64         0.2005            +5
        250      2803        2757          -3.87         0.2268            +6
        275      2706        2570          -5.38         0.2540            +8
        300      2612        2393          -7.19         0.2822            +10
        325      2519        2226          -9.32         0.3115            +11
        350      2428        2068         -11.79         0.3418           +14
        375      2339        1920         -14.63         0.3733           +16
        400      2252        1779         -17.87         0.4060           +18
        425      2167        1647         -21.53         0.4399           +20
        450      2084        1523         -25.66         0.4752           +23
        475      2002        1407         -30.29         0.5119           +26
        500      1923        1297         -35.46         0.5501           +28
        525      1845        1194         -41.22         0.5900           +31
        550      1770        1099         -47.61         0.6315           +35
        575      1696        1010         -54.71         0.6748           +38
        600      1626         927         -62.55         0.7199            +42





Thanks, Dinny

[LanceR]

Dinny, it looks good after a quick scan.  I'd need another cup or so of coffee to really read it while doing the mental gymnastics needed to proof read it.

I suspect you'd get more knowledgeable eyes looking at this if it were up on the handloading forum. 

Lance

[PowPow]

Dinny - As Talking Malibu Barbie says, Math is hard. The even 100's columns are correct when you compare Yards, Drop, and Clicks. Didn't check in between, but they appear in line. Compare it to this one from Biggameinfo.com. It has the clicks already calculated.

[Empty Quiver]

That is the formula I use to sight in.  This assumes of coarse your scope has 1/4 minute clicks.


 Some will argue minutia but you can figure 1 minute equals 1" at 100 yards, therefore 1 minute equals 2" at 200 yards, 3" at 300 yards, 4" at 400 yards, the minutia starts being significant the farther you take this. 1 minute equals 1/2 " at 50 yards and 1/4 " at 25 yards.


It can seem counter intuitive to crank the dials so much at close range and so little at distance. Being a fat SOB I relate to a piece of pie and the angle doesn't change the further from the center you just get more pie.

[Dinny]

Compare it to this one from Biggameinfo.com. It has the clicks already calculated.

I found this one after doing a thorough internet search. The numbers are close, but since I can add more variables to the Berger calculator, I think that is the difference.


Thanks,Dinny