308 trajectory help

[hungry hunter]

Allright all you gun bunnies, I have tried to get more information on blackhills gold ammo (ballistics, trajectory) and have not been able to find it on their website. I am fixin to test the max limits on 168gr, BTHP match. I got dope out to 500 yards and want farther. One answer I did get is that it will drop at least -51.6 inchs at 500 yards with a +2.1 inch at 100 yards, what would be the zero?. The rifle is a Savage FPLE 110 with 22" heavy barrel. I got the rifle currently zeroed at 100 yards and it will touch 5 holes shooting off bipod at this range.

[doubleA]

There are lots of variables to the equation but you would have a appx 200yd zero with what you stated. It would be appx 391 inches low at 1000 yds with a +2.1" 100 yd zero.

Ballistic charts are great guides but without exact data they fall a bit shortof being accurate when the ranges get way out there. I would strongly suggest you go out and shoot at the ranges you desire and keep records of everything.

Elevation, barometric pressure, temperature, sight height, actuall MV, bullet BC all play apart

[hungry hunter]

Thanks Double A, I do think I had better invest in a ton of ammo for this rifle.

[Mooresville Rocket]

I agree with Double A.

The Ballistics chart was made with a special barrel rifle, of a certain length and fired at a certain temperature.

Unless you had the exact same rifle and the exact temperature and weather conditions and was firing at the exact same shooting range - your results will vary.

Even a rifle that has been sighted in at 500 yards on a 70* day at 1000 feet in elevation, will hit in a different location if fired at a shooting range that is 3000 feet in elevation on a 60* day.

[deerslayer79]

I got a Savage 10flp in .308 with a 24" barrel and with hornady 150gr sst bullets and a 200yd zero I am 6.8" low at 300,and 14.7"low at 400,and 25.3" low at 500yds.

[Remedyman]

Shooting Information

I would HIGHLY recommend you look into the Ballistic Explorer software. If you can put in the information, you would be amazed at what you get.

[Remedyman]

Here is a sample of the data..

from the Ballistics Explorer program I mentioned. I tried to use some of the information from the site and from what you told me. Using the information from this program on my 22-250, I was able to hit a target dead center at 645 yards with a gun zeroed at 100 yards. The target was a 2'x2' piece of wood. I was impressed.

Name: PMC 2650mv 168wgt

Altitude: 800 feet

G1 BC: 0.463

Temperature: 30 øF

Muzzle Vel: 2650 f/s

Pressure: 29.53 in Hg

Sight Adj: 3.918 MOA

Humidity: 10%

Zeroed Rng: 100 yards

Wind Speed: 1 mph

Bullet Wgt: 168.0 grains

Wind Dir: 09:00 O'clk

Sight Height: 1.5 in

Range Slope: 0 deg

Close Zeroed Rng: 56.0 yards

Report Trace

Range Energy Path Drop Zero Adj Velocity

Yards ft-lb inches inches MOA f/s

0 2620 -1.50 0.00 ---- 2650

50 2430 -0.08 -0.63 0.2 2552

100 2251 0.00 -2.60 0.0 2456

150 2083 -1.36 -6.01 0.9 2363

200 1925 -4.27 -10.98 2.0 2271

250 1776 -8.87 -17.63 3.4 2181

300 1636 -15.30 -26.11 4.9 2094

350 1505 -23.71 -36.57 6.5 2008

400 1382 -34.27 -49.19 8.2 1925

450 1268 -47.19 -64.15 10.0 1843

500 1161 -62.66 -81.67 12.0 1764

550 1062 -80.92 -101.99 14.1 1687

600 971 -102.24 -125.36 16.3 1613

650 887 -126.90 -152.07 18.6 1542

700 810 -155.22 -182.44 21.2 1473

750 740 -187.55 -216.82 23.9 1408

800 676 -224.26 -255.58 26.8 1346

850 619 -265.77 -299.14 29.9 1288

900 568 -312.52 -347.94 33.2 1234

950 524 -364.98 -402.45 36.7 1185

1000 485 -423.63 -463.16 40.5 1140

[deerslayer79]

I stand corrected on my earlier post to this topic,at 400yds drop is 24.7" low and at 500yds it drops 52" sorry guys.