You want to either zero at 25-30yds or 50yds. How long your bullet stays in the air also depends on the shape. This is a .223 ballistics chart (external) generated using our ballistic trajectory calculator. Based off a standard 55gr bullet leaving the barrel at 3,215fps and follows the bullet trajectry all the way to 1000 yards in steps of 50 yard increments. Has anyone figured out the angle of departure (the angle of the rifle barrel relative to the horizontal) needed to make that shot without holding over and whether the rifle sights can be raised to that point? If you have a firearm related question, please register and post it on the forums. Some time in the future I'm going to try my AR15 at 600 yds. This is why when you are shooting at various distances it is important to know the distance and know how far your bullet will drop so that you can compensate. For the rest of us just sight your AR in at 50 yards and leave it alone.
Finally you have to consider the initial velocity of the bullet. A This can be useful in comparing cartridges or loads. © Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. At short distances the bullet will impact below your point of aim then travel upwards and intersect the point of aim at the distance where you sighted in then start to drop. Based off a standard 55gr bullet leaving the barrel at 3,215fps and follows the bullet trajectry all the way to 1000 yards in steps of 50 yard increments. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. This chart does not account for atmospheric conditions, so if you want to take in to effect these things check out the calculators official page. On any rifle the sights are some distance above the bore line which has a slight upward angle (the height of the sights is another factor to consider). In fact the bullet drop and performance is about the same as for the .223 round fired from a carbine, but of course the .308 has a lot more energy.
I ran a couple scenarios though my calculator... Geco chronos at 2967 out of a 16" barrel. Hmmm. It helps if you can chronograph your load so you know exactly what your average velocity is for your ammo and your rifle. I've thought about how to go about this, although I'm not interested in shooting my AR's beyond 300 yards. In this chart I lowered the velocity to compensate for a 20 inch barrel instead of the 24 inch barrel listed: The lesson here is that if you need precision at medium distances or just want to hit a target at longer distances, you need to know exactly how your bullet will perform. That is actually not correct.
Joined Jan 2009; Posts 331; EE Offline; KS, USA . In fact the bullet drop and performance is about the same as for the .223 round fired from a carbine, but of course the .308 has a lot more energy.
It turns out that zeroing a .308 AR at 50 yards works just as well. Using one of the many bullet drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances easily. Accepting those figures as given, a 102" drop is 8.5 feet, which means that to hit a deer size target at 600 yards, a hunter would have to aim at a point 8 feet over his back.
But don't waste your time with a 55 at 600, we had one guy shoot a highpower match, his 55 FMJ loads were actually bouncing off the target frames back into the pitts at 600 and were all over the place. Put your aim point at the top, and make the target about 8 feet high. Yea, it is probably transonic at 600 yds which may be pretty unstable with this type of bullet. Different shaped bullets will have different levels of drag and some will fly longer and straighter than others. These calculators are also available as apps for smart phones: http://www.hornady.com/ballistics-resource/ballistics-calculator, http://www.winchester.com/learning-center/ballistics-calculator/Pages/ballistics-calculator-silverlight.aspx. I shot the NMC course with a Colt HBAR using the 68 grainers, using the Win 748 and miSPec cases. It will a produce a line graph showing the bullet drop and flight path of the bullet.
The Ballistic Coefficient for the .223 Remington, Remington Metal Case, 55gr is 0.202 (in this example) but, but may also range from .185 bc to .257, A If you zero that in at 50 yards, it will hit 4.2 inches low at 200 yards. Zero at 25-30yds will put you a little high at 100 and 200yds and zero again at 300 and a zero at 50yds will put you a little high at 100 and 200yds and zero again at 210-240yds.
In shooting, the second the bullet exits the barrel gravity takes hold and starts to pull the bullet down towards the ground. .223 Remington, Using Hornady's BC I calculated both 100 yd zero and what I use, 200 yd zero. The situation is worse for a 62 grain .223 FMJ bullet since the higher weight also reduces muzzle velocity to around 2,700 FPS. Thanks _____ Fast is fine, but accuracy is everything. You should never zero at 100yds your trajectory will be too flat and result in massive drop. I'm trying to work out what bullet drop from 100 yd zero I'm likely to get, so I can adjust my scope from 100 yd zero. About 14 minutes from 100 yard zero. Gravity exerts more force on a heavier bullet and pulls it down faster.
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