I was always taught to zero my weapons for 300m as a battle sight zero. Now they have (in the Army) a 250m zero that is much flatter. I still stick with my 300m zero.
If I am shooting at 100 YARDS (not meters), how high should my bullet strike be for a 300m zero. I am used to shooting approx. 8" high at that range, but would like confirmation.
Should strike about 4 inches high at 100 yards. If you can, zero iron sights at 50 yards (it’s close enough to 50 meters). Line of sight and bullet strike is designed to cross at 50 and 300 meters. It will also vary slightly by the grain of round you are firing.
Here is a chapter from the Army Marksmanship Field Manual. Scroll down and there is a section on ballistics.
http://www.globalsecurity.org/military/library/policy/army/fm/3-22-9/c05.htm#5_5
I was always taught to zero my weapons for 300m as a battle sight zero… I still stick with my 300m zero.
If I am shooting at 100 YARDS (not meters), how high should my bullet strike be for a 300m zero. I am used to shooting approx. 8" high at that range, but would like confirmation.
You’re sticking with something but you don’t know where you’re hitting at shorter ranges, and you don’t know why the Army changed to a 250 Meter zero? And you’ve never personally confirmed where you’re hitting at 100?
Here is a simple calculator: http://www.realguns.com/calc/exteriorballistics
There are many others like JBM. I’m pretty sure an AR uses a 2.6" sight height.
Once you play around with this a bit, I think you’ll really enjoy it. Although it’s not conventional, I actually like a 40 yard zero. Do what works best for your purposes.
False. The far-zero associated with a 50 meter near-zero will not be anywhere near 300 meters.
This is correct! The point where the bullet drops back down to the POI is closer to the 250 meter mark…thus why the army is going this direction.
During the flight of the round the bullet will go from approximately -2.00 inches to +2.00 inches between 0 and 250 yards with a 50 meter zero. The bullet will drop quickly off at that point much like the arc of the 300 meter zero. The Army has gone to this knowing that most combat situations happen between 0 and 175/200 meters in the areas we are in conflict now. That small amount of rise and fall in the bullets trajectory over the 0-250 meter flight allows a soldier to not have to worry about a hit on a person when aiming center mass. With the old zeroing proceedures if you didn’t hold low on the 200 and just below COM at the 250 you will miss the target as the round is high in its arc for the 300 meter zero.
Play with the calculators for the grain and the distance and you will see the large arc of the 5.56 bullet with a battle site zero at 25 meters.
I have an ACOG on my rifle that I zeroed to 100 meters to take advantage of the Bullet drop compensation reticle and a red dot site at 25 degrees off of the front rail zeroed at 50 meters. For me this is a great combination that allows for magnifed distance shooting and transitioning to quick close in engagements without losing my cheek weld on the stock of my M4.
How this helps and if not that is OK too. V/R Outlaw5 