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200 meter zero
Old 11-20-2008, 22:27   #1
Lmmsoat
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200 meter zero

I wanted to survey everyone on the use of the 200m Zero for the M-4. The benifit over the old "25 makes on target at 300" is simplifying the shift of aim. With the old method of zero, the bullet would cross the line of sight at 25m (on the magical Z setting) rise and recross the line of sight at roughly 300m. Some in the shooting community found this confusing because you needed to aim low at 200m for a low percentage shot. A new school of thought is to sight in POA/POI at 200m. This would mean the first cross would happen at roughly 50m (not exactly sure). This would mean roughly six inches high at 100m and roughly 6 low at 300m (if your optamistic and going for a head shot). What this equates to is a centermass hold getting a center mass hit anywhere within the engagment range of the M-4. My question would be has anyone tried it and if so, any comments?

I tried the search button and found nothing. If I'm in error I appoligise ahead of time.
 

On a couple of threads down I posted this.
Old 11-20-2008, 23:56   #2
Blitzzz
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On a couple of threads down I posted this.

This was in response to the question of 10.5 in barrel zero.
nI wrote the following:

I agree with 100 meters.
if you zero at 100 meters then the following:

M-193 ball = 4 inch target area out to 150 meters.

M-855 ball =4.2 inch target area out to 150 meters.

Added Info:
also if you zero the M193 ball @ 250ms you have +9.9 inch at 200ms, -15.1 at 300.

and for the M855 ball with 300 meter zero, = a +12.6 inches @ 150+
I'd do the 100 meter zero
Blitz

But in response to your question ,Yes, 200 meters would be much like a "point blank zero". Used in hunting circles it refers to the zero distance that allows the shooter to engage a "target" with out hold off. If you can achieve that with a 200 meter zero then do it. but as you stated that's a 12 inch circle at 300 meters.
You might tighten that circle at about 175 meters to around 9.5 inches.

Let us know when you do, good luck Blitz
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Old 11-21-2008, 07:46   #3
Peregrino
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The search button is your friend. This is the second BSZ thread in a week, and there are archived threads going back years. The original thread has all the math for "flavor of the day" BSZs with your choice of optics.
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Old 11-21-2008, 08:07   #4
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Thanks for the quick reply Blitz. I was introduced to it by some co-workers of mine. I've used it with good results for a few years. I was asking the question because I'm starting to hear this zeroing method in conventional army circles. I wanted to see how far it has spread in the Groups.

Thanks again
 

Old 11-21-2008, 08:11   #5
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Thanks Peregringo. I guess I need to broaden my search. I tried searching for "200 meter zero". I'll put more leg work in before I post again.

Thanks
 

Old 11-21-2008, 09:25   #6
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Understood. FWIW - I got 30 hits typing "zeroing", some of them are even relevant. I'm going to save some bandwidth (and foster better search skills among our newer members) and close this thread.
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A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murderer is less to fear.

~ Marcus Tullius Cicero (42B.C)
 
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