I haven't been able to shoot my 308 through a chrono yet and am going to shoot 500 yards this weekend. I've only shot 100 yards with it with great results. I'm hoping i can hit the paper at 500 and if so then i can dial everything in and figure up a drop chart. I'm shooting 44g of reloader-15 in new win. brass, 210m primers, 168 matchkings, 2.805" oal, down a 26" factory remington barell (xcr LRT). Anybody got a guess as to drop at 500 yards, or velocity with this load? Any help would be greatly appreciated. This is my first long range gun and I'm still learning everything.
Velocity Guess? Help with drop chart?
- Thread starter bjordan
- Start date
Re: Velocity Guess? Help with drop chart?
Here's a guess: 2700 FPS
Range Drop Drop Windage Windage Velocity
(yd) (mil) (MOA) (mil) (MOA) (ft/s)
0 *** *** *** *** 2700.0
100 -0.0 -0.0 0.2 0.8 2493.9
200 -0.5 -1.8 0.5 1.6 2296.7
300 -1.3 -4.6 0.7 2.5 2109.1
400 -2.3 -7.8 1.0 3.4 1930.5
500 -3.3 -11.5 1.3 4.5 1759.7
600 -4.6 -15.8 1.6 5.6 1595.8
That should get you started.
Here's a guess: 2700 FPS
Range Drop Drop Windage Windage Velocity
(yd) (mil) (MOA) (mil) (MOA) (ft/s)
0 *** *** *** *** 2700.0
100 -0.0 -0.0 0.2 0.8 2493.9
200 -0.5 -1.8 0.5 1.6 2296.7
300 -1.3 -4.6 0.7 2.5 2109.1
400 -2.3 -7.8 1.0 3.4 1930.5
500 -3.3 -11.5 1.3 4.5 1759.7
600 -4.6 -15.8 1.6 5.6 1595.8
That should get you started.
Re: Velocity Guess? Help with drop chart?
I'm not a 308 expert, but have shot the M-118LR quite a bit, so I will guess 2750fps out of 44grs of RL15 and 26" barrel.
That drives the following ballistics (at 0' DA):
Range Drop Drop
(yd) (in) (MOA)
0 -2.0 ***
100 -0.0 -0.0
200 -3.4 -1.6
300 -13.1 -4.2
400 -30.3 -7.2
500 -56.5 -10.8
I'm not a 308 expert, but have shot the M-118LR quite a bit, so I will guess 2750fps out of 44grs of RL15 and 26" barrel.
That drives the following ballistics (at 0' DA):
Range Drop Drop
(yd) (in) (MOA)
0 -2.0 ***
100 -0.0 -0.0
200 -3.4 -1.6
300 -13.1 -4.2
400 -30.3 -7.2
500 -56.5 -10.8
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