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gunshinestate  [Member]

2/26/2010 4:09:06 PM

Im in the process of learning ballistics data and such and have been working with JBM calculations.

Would any of you mind taking a look at this and tell me if you see any glaring faults with my input data?

Going to the range soon and want to have a good starting point.

ETA RIFLE INFO.

.223 Ar.
16" WOA SS barrel
Burris PEPR mount
SS 3-9x40 (c.o.b. ~2.5 ?????)





From JBM __

Trajectory Input Data Manufacturer: Nosler Description: Partition™ Spitzer Caliber: 0.224 in Weight: 60.0 gr Ballistic Coefficient: 0.228 G1 Bullet Length (Library): 0.790 in Muzzle Velocity: 3140.0 ft/s Distance to Chronograph: 10.0 ft Sight Height: 2.50 in Sight Offset: 0.00 in Zero Height: 0.00 in Zero Offset: 0.00 in Windage: 0.000 MOA Elevation: 0.000 MOA Line Of Sight Angle: 0.0 deg Cant Angle: 0.0 deg Barrel Twist: 7.0 in Twist Direction: Right Wind Speed: 1.0 mph Wind Angle: 90.0 deg Target Speed: 10.0 mph Target Angle: 90.0 deg Temperature: 65.0 °F Pressure: 29.92 in Hg Humidity: 0.0 % Altitude: 0.0 ft Vital Zone Radius: 5.0 in Std. Atmosphere at Altitude: No Pressure is Corrected: Yes Zero at Max. Point Blank Range: No Target Relative Drops: Yes Mark Sound Barrier Crossing: No Include Extra Rows: No Column 1 Units: 1.00 mil Column 2 Units: 1.00 MOA Round Output to Whole Numbers: No Output Data Elevation: 5.649 MOA Windage: -0.105 MOA Atmospheric Density: 0.07560 lb/ft³ Speed of Sound: 1122.9 ft/s Maximum PBR: 342 yd Maximum PBR Zero: 296 yd Range of Maximum Height: 174 yd Energy at Maximum PBR: 456.7 ft•lbs Sectional Density: 0.171 lb/in² Stability at Muzzle: 3.637 "</> </> Calculated Table 0 drop mil drop moa wind mil wind moa 3154.8 2.809 1325.8 0.000 *** *** 50 0.0 0.0 0.0 0.0 2937.6 2.616 1149.5 0.049 4.8 16.6 100 0.4 1.4 0.0 0.1 2730.8 2.432 993.4 0.102 5.0 17.2 150 0.3 1.2 0.1 0.2 2533.3 2.256 854.9 0.159 5.2 17.8 200 0.1 0.4 0.1 0.3 2344.2 2.088 732.0 0.221 5.4 18.6 250 -0.2 -0.7 0.1 0.5 2163.2 1.926 623.3 0.287 5.6 19.3 300 -0.6 -2.0 0.2 0.6 1990.3 1.772 527.6 0.360 5.9 20.2 350 -1.0 -3.5 0.2 0.8 1826.1 1.626 444.2 0.438 6.1 21.1 400 -1.5 -5.3 0.3 0.9 1671.6 1.489 372.2 0.524 6.4 22.0 450 -2.1 -7.4 0.3 1.1 1528.2 1.361 311.1 0.618 6.7 23.1 500 -2.8 -9.7 0.4 1.4 1397.8 1.245 260.3 0.721 7.0 24.2 550 -3.6 -12.4 0.5 1.6 1282.5 1.142 219.1 0.833 7.4 25.5 600 -4.5 -15.5 0.5 1.9 1184.9 1.055 187.0 0.955 7.8 26.7

26/02/10 16:06, JBM/jbmtraj_drift-5.0.cgi

gunshinestate  [Member]

3/3/2010 11:16:26 AM

bigmill51  [Member]

3/3/2010 11:20:02 AM

gunshinestate  [Member]

3/3/2010 2:14:15 PM

It is my first time messing around with it and im going on a hunting trip with my new build.

I want to at least make sure im in the ballpark with the figures before I send $'s down range.

Have a good one.

fx.

NOMADSS  [Member]

3/28/2010 2:58:25 PM

DansFlash  [Team Member]

6/6/2010 7:58:04 AM

Maryland_Shooter  [Team Member]

7/21/2010 7:07:39 AM