Shot this load at 950 yards today, to get a better handle on BC and retained velocity.
I applied 25.5 moa, and fired five rounds. Only registered one hit on the steel. I went back to the target, and found a decent sub-moa group in the dirt, just a bit below the target. Group was about 1.5 moa low of aiming point.
So, based on a 950 yard correction of 27.0 moa, it loks like BC comes out to about .430.
Conditions made it impossible for me to spot my hits/misses through the little scope. I did get an audible indicator on the highest round that hit the steel.
Here's the target. 15" x 25" steel. Note the hit near bottom, and you might be able to make out the hits in the dirt.
At 950 yards, the target was nearly invisible, even through the scope. Looked kinda like this:
I was at 4500', temp about 20-25F. Corrected trajectory table looks like this:
Gunsite altitude : 4500 ft.
Gun / Ammunition : .308 Win.
Bullet : .308, 130, Barnes 'TTSX'BT
Bullet weight : 130 grains or 8.42 Grams
Muzzle velocity : 3124 fps
Crosswind speed : 10 Mph
Ballistic Coefficient(s) (G1):
C1=0.430@V>0 fps;
Range Velo Time of Energy Path Deflection Total Sight correction Target
city flight to at crosswind drop for setting new lead
LOS of 10.0 Mph zero range 33 fps
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�Yards fps s ft.lbs. in. in. MOA in. Clicks MOA yds �
-------------------------------------------------------------------------------------
| 0 3124 0.0000 2817 -1.5 0.0 ----- 0.0 ------ ----- 0.00
| 50 3004 0.0490 2604 -0.3 0.2 0.34 0.5 +1.5 +0.52 0.54
M 87 2917 0.0864 2455 0.0 0.5 0.55 1.4 -0.1 -0.03 0.94
X 100 2887 0.0998 2405 0.0 0.7 0.63 1.9 0.0 0.00 1.09
| 150 2773 0.1528 2219 -0.7 1.5 0.98 4.3 +1.4 +0.49 1.67
| 200 2662 0.2083 2045 -2.7 2.9 1.36 7.9 +3.7 +1.29 2.28
P 206 2649 0.2151 2025 -3.0 3.0 1.41 8.5 +4.1 +1.39 2.35
| 250 2554 0.2660 1883 -5.8 4.6 1.74 12.8 +6.5 +2.24 2.91
| 300 2449 0.3259 1730 -10.3 6.7 2.12 18.9 +9.6 +3.28 3.56
| 350 2346 0.3880 1588 -16.1 9.1 2.49 26.5 +12.8 +4.41 4.24
| 400 2245 0.4534 1455 -23.6 12.2 2.91 35.6 +16.4 +5.65 4.96
| 450 2147 0.5220 1331 -32.8 15.8 3.36 46.6 +20.3 +6.99 5.71
| 500 2052 0.5937 1215 -44.0 20.0 3.82 59.4 +24.5 +8.42 6.49
| 550 1958 0.6681 1107 -57.1 24.6 4.28 74.2 +28.9 +9.92 7.31
| 600 1867 0.7453 1006 -72.2 29.8 4.74 91.0 +33.5 +11.51 8.15
| 650 1779 0.8278 914 -90.2 35.8 5.27 110.7 +38.6 +13.27 9.05
| 700 1695 0.9152 829 -111.2 42.8 5.83 133.4 +44.2 +15.19 10.01
| 750 1614 1.0070 752 -135.4 50.5 6.43 159.3 +50.2 +17.25 11.01
| 800 1535 1.1027 680 -162.8 58.9 7.03 188.4 +56.6 +19.45 12.06
| 850 1459 1.2019 615 -193.5 67.9 7.62 220.8 +63.3 +21.75 13.14
| 900 1388 1.3065 556 -228.5 77.8 8.26 257.5 +70.5 +24.25 14.29
| 950 1322 1.4177 505 -268.7 89.0 8.94 299.4 +78.6 +27.02 15.50
| 1000 1261 1.5342 459 -314.0 101.0 9.65 346.4 +87.3 +30.00 16.78