A little ballistic help guys

[bruchi]

I am kinda new to this, have a cheap rig and every once in a while I get to shoot at a ~1200 yard range and need a basic starting point here, we shoot at F class type paper targets both at 300 and 600 yards, metal plates at 600, 800 yards and then there are metal silhouettes at longer distances, not even thinking about those now.

Once I get on paper, sometimes this takes a while I can crawl my way to the 10 spot, only tried once a few rounds at the 10" plates at 600 & 800 yards, got close but close don't count.

I am not asking for a "free" ballistic table, I know it is best if I work that out myself, just a starting point here, ammo is getting pricier and hard to find. I ask the guys at the range but then I get half a dozen suggestions!

I got a Remington 700 SPS Varminter in 308, 26" barrel, 1-12 twist, it seems to like the Black Hills 308 168gr HPBT ammo and the Federal Match 175 gr. Scope is a Nikon 4-12x 50mm, Haris 6-9" bipod, EGW scope mount and no brand, ebay, cheap, cheap medium height 30mm rings with 1" shims I have to upgrade. (suggestions?)

So if I zero the rifle at 100 yards, what would be good starting points elevation wise for 300, 600 and 800 yards?

Just want to get on paper so I can work it out from there!

Then there's a formula for windage correction, something along the lines at using the flag as the indicator on a compass?

JIC this is my rifle, in 308.

http://www.remington.com/products/firearms/centerfire_rifles/model_700/model_700_SPS.asp

 

[BLAWTON]

Re: A little ballistic help guys

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Tabular trajectory data at Non-Std. Atmosphere
Gunsite altitude : 6000 ft.
Air density : 0.07601 lb./ft³
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Gun / Ammunition : .308 Win.
Bullet : .308, 175, Sierra HPBT MatchK 2275
Bullet weight : 175 grains or 11.34 Grams
Muzzle velocity : 2659 fps
Crosswind speed : 5 Mph
Ballistic Coefficient(s) (G1):
C1=0.496@V>2800 fps;
C2=0.487@V>1800 fps;
C3=0.477@V>0 fps;


Optimum trajectory information :
Optimum sight-in range (X) = 187 Yds.
with max. ordinate above LOS at range (M)= 115 Yds.
and max. point blank range (P)= 215 Yds.
-------------------------------------------------------------------------------------
Sight-in clicks, 1 click = 1.0 cm/100 m or 0.394 in/100 m
Height of sight above bore axis = 5.0 cm or 1.969 inch
Gun is zeroed-in at 100 yds,
by sighting-in at level firing
-------------------------------------------------------------------------------------
Range Velo Time of Energy Path Deflection Total Sight correction Target
city flight to at crosswind drop for setting new lead
LOS of 5.0 Mph zero range 33 fps
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·Yards fps s ft.lbs. in. in. MOA in. Clicks MOA yds ·
-------------------------------------------------------------------------------------
| 0 2659 0.0000 2747 -2.0 0.0 ----- 0.0 ------ ----- 0.00
M 89 2499 0.1034 2426 +0.1 0.3 0.29 2.0 -0.1 -0.04 1.13
X 100 2479 0.1165 2388 0.0 0.3 0.31 2.6 0.0 0.00 1.27
P 163 2369 0.1941 2181 -1.6 0.9 0.53 7.0 +2.7 +0.93 2.12
| 200 2306 0.2417 2067 -3.6 1.4 0.68 10.8 +5.1 +1.75 2.64
| 300 2140 0.3773 1780 -13.9 3.4 1.09 25.6 +12.9 +4.45 4.13
| 400 1981 0.5219 1525 -31.6 6.2 1.49 47.8 +22.0 +7.55 5.71
| 500 1829 0.6790 1300 -58.1 10.1 1.93 78.9 +32.3 +11.11 7.43
| 600 1684 0.8520 1102 -95.7 15.4 2.46 121.1 +44.4 +15.26 9.32
| 700 1548 1.0383 931 -145.4 21.9 2.99 175.3 +57.8 +19.86 11.36
| 800 1421 1.2389 785 -209.1 29.7 3.54 243.5 +72.6 +24.97 13.55
| 900 1310 1.4598 667 -291.4 39.2 4.16 330.4 +90.0 +30.94 15.96
| 1000 1212 1.6977 571 -394.1 50.2 4.79 437.6 +109.5 +37.65 18.57
| 1100 1132 1.9542 498 -521.6 62.9 5.46 569.6 +131.7 +45.29 21.37
| 1200 1068 2.2273 443 -676.6 77.0 6.13 729.2 +156.7 +53.86 24.36
| 1300 1017 2.5154 402 -861.9 92.5 6.79 919.1 +184.2 +63.32 27.51
| 1400 975 2.8162 370 -1078.8 109.1 7.44 1140.5 +214.1 +73.59 30.80
| 1500 939 3.1306 343 -1330.8 126.8 8.07 1397.1 +246.4 +84.72 34.24
| 1600 907 3.4555 320 -1617.9 145.5 8.69 1688.8 +280.8 +96.56 37.79
| 1700 878 3.7909 300 -1942.5 165.2 9.28 2017.9 +317.3 +109.10 41.46
| 1800 852 4.1383 282 -2308.6 185.8 9.86 2388.5 +356.1 +122.44 45.26
| 1900 827 4.4965 266 -2717.5 207.5 10.43 2802.0 +397.1 +136.52 49.17
| 2000 804 4.8636 251 -3169.4 229.9 10.98 3258.4 +439.9 +151.24 53.19
| 2100 781 5.2413 237 -3668.7 253.2 11.52 3762.2 +484.9 +166.70 57.32
| 2200 760 5.6312 225 -4220.5 277.7 12.05 4318.7 +532.4 +183.03 61.58
| 2300 740 6.0326 213 -4827.0 303.1 12.59 4929.7 +582.3 +200.19 65.97
| 2400 721 6.4442 202 -5488.7 329.5 13.11 5596.0 +634.4 +218.10 70.47
| 2500 702 6.8649 191 -6206.5 356.6 13.62 6318.2 +688.5 +236.69 75.08
| 2600 684 7.2958 182 -6984.6 384.7 14.13 7100.9 +744.8 +256.05 79.79
| 2700 666 7.7408 172 -7834.0 414.0 14.64 7954.9 +804.1 +276.47 84.65
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M = Peak vs. L.O.S, X = Set Zero, P = Max. Point Blank Range
Elevation above Angle of Site (0.0 deg.) = 0.0721 deg.

 

[marduk185]

Re: A little ballistic help guys

or go to jbm imho.

 

[bruchi]

Re: A little ballistic help guys

"Notaguru" Thanks very much but I can't make head or tails of that info, I guess I AM REALLY NEW TO THIS! I am sure it is great info you are sharing here but unfortunately it is lost on me, that is my short comming not yours at all so thanks again.

 

[bruchi]

Re: A little ballistic help guys

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: marduk185</div><div class="ubbcode-body">or go to jbm imho. </div></div>

What is JBM? Where?

 

[Lindy]

Re: A little ballistic help guys

JBM Ballistics