Bullet Trajectory of 5.56
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Old 03-10-2012, 12:47 AM   #1
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Default Bullet Trajectory of 5.56

I have been doing some calculations of the trajectory of a 5.56 mm Federal Ammo M855 62 grain round. I am competing in a sniper challenge here in Ohio and they have a 1000 yd shot during this competition. I have never shot my AR-15 at 1000 yds and have a HWS with 3x magnifier with a .5 MOA dot and 65 MOA cirlce so I need to try and figure out the calculations before the competition. I guess what I am asking is if anyone here has any other info on the trajectory of the round I use. I just want to be able to try and calculate the shot.

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Old 03-10-2012, 01:00 AM   #2
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There are several very good ballistics programs on the net and apps for some to use on a droid. Google ballistics programs.

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Old 03-10-2012, 01:01 AM   #3
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I think you should get some good long range glass for a "sniper competition" 1000 yards with a red dot will not be easy. And maybe look into some match grade or handloads. But that is just my opinion.

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Old 03-10-2012, 01:04 AM   #4
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Firearm type Match Sight Height 1.5
Bullet Weight (grains) 62 Ballistic Coefficient .238
Muzzle Velocity (fps) 3100 Temperature 68
Barometric Pressure (hg) 29.53 Relative Humidity 78%
Zero Range (yards) 100 Wind Speed (mph) 0



Ballistics Table in Yards 62 gr., .238 B.C. www.hornady.com

Range (yards) Muzzle 100 200 300 600 800 1000
Velocity (fps) 3100 2708 2348 2016 1236 987 860
Energy (ft.-lb.) 1323 1009 759 560 210 134 102
Trajectory (100 yd. zero) -1.5 0.0 -3.3 -12.9 -108.3 -276.6 -572.4
Come Up in MOA -1.5 0.0 1.6 4.1 17.2 33.0 54.7




The following table is provided as a "cheat sheet" that you can tape to your gun.
Ballistics Table in Yards 62 gr., .238 B.C. www.hornady.com

Range (yards) Muzzle 100 200 300 600 800 1000
Trajectory (100 yd. zero) -1.5 0.0 -3.3 -12.9 -108.3 -276.6 -572.4
Come Up in MOA -1.5 0.0 1.6 4.1 17.2 33.0 54.7


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Old 03-10-2012, 01:06 AM   #5
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I know I should, but I don't have the cash right now and I just recently thought about entering into the competition. The full competition only has the one 1000 yd shot so I don't want to buy a good scope that will make it harder to make other shots at closer distances and other non scoped shots.

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Old 03-10-2012, 01:09 AM   #6
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I did find that the Federal M855 has a BC of .250 so I used a calculator and came up with a bullet drop of 480 inches for that round.

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Old 03-10-2012, 01:13 AM   #7
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are you going to have it zeroed at 200 ? If so a 69 Gr Sierra Matchking will fall off about 48.5" at 500 yards . You got anything bigger for you 1000 yard shot or is it limited to .223/ 5.56 ? If I was going to be shooting that far I would be looking at 6.5, 7mm, .338 lapua, .308 etc

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Old 03-10-2012, 01:17 AM   #8
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.338 is the largest caliber for the match. I can only use one rifle and I only have the AR. It is zeroed at 100 yds and I want to keep it there. I am just shooting the competition to have some fun and see if I can actually compete. I know I can shoot, I was an expert rifleman in the marines and just wanted to see how good I am in the terms of other people. I am not expecting to go out there and beat everyone, just want to get a feel of how these competitions go and what it is like.

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Old 03-10-2012, 01:23 AM   #9
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Your scope will not have enough elevation adjustments for 1000 yds zero.
a base that is thicker in the rear or shimming is required

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Old 03-10-2012, 01:29 AM   #10
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Quote:
Originally Posted by sniper762 View Post
Your sope will not have enough elevation adjustments for 1000 yrds. Zero.
Thats what I was getting ready to say , it will probably be a guessing game after 600-700 or so yards with your dot. I think even with the 24X scope I have 600-700 is off the marks and out of the picture at full zoom for .223 / 5.56
Never hurts to try but the 5.56 isnt going to have a chance up against the flat shooting .338
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