Could you tell me what make an Manufacture an bullet weight you use.
Thx.
federal, xm855 green tip on an 18.5 inch barrel

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Could you tell me what make an Manufacture an bullet weight you use.
Thx.
Out of curiosity, if you only have a 100 yard range, how much higher or lower do you sight in the POI to have it zeroed for 100 m??? (this is for ACOG)
I read an interesting post on ar15.com supporting the 100m zero. It's written in the context of combat shooting but the first point about low misses providing feedback is one I hadn't considered before.
http://www.ar15.com/content/page.html?id=208
What would one sight a 1-4 scope in for? Is the 50/200 still relevant then?
It depends upon the literature for the optic. I zero in my ACOG for 100m because the literature says to. The RMR on top is set up for 50/200.
-S.
An RMR is not an ACOG.
I assume MLP is talking about one of these setups.
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On the topic of ACOGs, I've heard they use a 36m/300m zero. Can anyone explain how that works?
Ok. I have a dumb question for you experts here. Please bear with me if this doesn't make any sense.
For the purpose of this question, I am going to use some hypothetical numbers for the sake of conversation.
Lets just say that I want to zero my AR (or any rifle of that matter) with a 100 yard zero.
However, my skills to shoot and see the holes at 100 yards is not up to par. However, I have no issue shooting accurately or seeing my holes on paper at 50 yards.
If I were to look up the ballistic trajectory of said round, and with a 100 yard zero it prints 0.5" high at 50 yards, does that mean that I can zero it at 50 yards and then dial it up by 0.5" (again at 50 yards) to get a 100 yard zero POA/POI?
Or am I completely wrong on this?
Ok. I have a dumb question for you experts here. Please bear with me if this doesn't make any sense.
For the purpose of this question, I am going to use some hypothetical numbers for the sake of conversation.
Lets just say that I want to zero my AR (or any rifle of that matter) with a 100 yard zero.
However, my skills to shoot and see the holes at 100 yards is not up to par. However, I have no issue shooting accurately or seeing my holes on paper at 50 yards.
If I were to look up the ballistic trajectory of said round, and with a 100 yard zero it prints 0.5" high at 50 yards, does that mean that I can zero it at 50 yards and then dial it up by 0.5" (again at 50 yards) to get a 100 yard zero POA/POI?
Or am I completely wrong on this?
You're right you can shoot at 50 and take into account where your POI should be for a 100 yard zero. The problem with zeroing where your bullet first crosses your line of sight is that it's often very close and any difference in either windage or elevation often goes undetected. Your group looks great up close but when you start shooting at distance those imperceptible errors of windage and elevation wreak havoc. Zeroing at the close range is a great way to get on paper and give you a rough idea where your rounds should hit at distance. It is always best to zero at your intended distance and then shoot at other intermediate distances to determine where your hold lines(In an ACOG for instance) actually correspond.