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Long Range Hunting & Shooting
Why would you not sight in at 100 yards?
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<blockquote data-quote="Core781" data-source="post: 1631408" data-attributes="member: 106156"><p>I sight my SPR in at 100 meters because it works with my dope data which I run through a ballistic calculator with a 100 yard zero. When in the field, I test it to the intended range and check my data and make corrections depending on my elevation and environments. I have a red dot on my SPR also, I sight it for CQB.</p><p></p><p>But I sight my M4 SOPMOD in at 400 meters because it exhausts the cartridge's capability for it's intended purpose (with red dot sight non-magnified) the bullet path is very minute inside 30 meters so holdover for CQB shots is minimal. What I do is zero with a laser at 300 meters with my software and go to a 400 meter range and zero up until I shoot a playing card sized group with 62g mil 5.56N (keep in mind I use a lower 1/3 co-witness optic). I take it back to 10 meters and shoot a group. I'll walk back to 400 meters and go prone at 200 meters, 300, and finally 400. It stacks the hits tighter so your margin of error is less. If I were using a MK18 I would zero as far out until I get no more than 1" off elevation at close range inside 5 meters and find the sweet spot knowing the MK18 max accurate range is limited to that specific distance. When you apply the science, and get repeatable results you build confidence in your system and you're good to go. </p><p></p><p>If I take a man-sized target and aim between the eyes at 10 meters, it will strike the upper jaw area with a 400 meter zero. If you have a 65moa ring, it makes it easier to train out to further distances by using the bottom ring and y axis rung to ensure you get proper windage at CQB. For this reason I wish all red dots had 62/65 moa rings like Eotech and a few others. The Marines use a 36 yard zero for this reason. I was trained by Marine Raiders and NSW, and they emphasized the importance of being able to take your weapon to max effective range. Fighting less than stellar trained men with AK's in the desert I learned to utilize the max range theorem and its importance. We had the enemy out-matched. In the real world you do not want the enemy to advance any closer than the range of your rifle: if you are out-matched you should be moving in the other direction..</p></blockquote><p></p>
[QUOTE="Core781, post: 1631408, member: 106156"] I sight my SPR in at 100 meters because it works with my dope data which I run through a ballistic calculator with a 100 yard zero. When in the field, I test it to the intended range and check my data and make corrections depending on my elevation and environments. I have a red dot on my SPR also, I sight it for CQB. But I sight my M4 SOPMOD in at 400 meters because it exhausts the cartridge's capability for it's intended purpose (with red dot sight non-magnified) the bullet path is very minute inside 30 meters so holdover for CQB shots is minimal. What I do is zero with a laser at 300 meters with my software and go to a 400 meter range and zero up until I shoot a playing card sized group with 62g mil 5.56N (keep in mind I use a lower 1/3 co-witness optic). I take it back to 10 meters and shoot a group. I'll walk back to 400 meters and go prone at 200 meters, 300, and finally 400. It stacks the hits tighter so your margin of error is less. If I were using a MK18 I would zero as far out until I get no more than 1" off elevation at close range inside 5 meters and find the sweet spot knowing the MK18 max accurate range is limited to that specific distance. When you apply the science, and get repeatable results you build confidence in your system and you're good to go. If I take a man-sized target and aim between the eyes at 10 meters, it will strike the upper jaw area with a 400 meter zero. If you have a 65moa ring, it makes it easier to train out to further distances by using the bottom ring and y axis rung to ensure you get proper windage at CQB. For this reason I wish all red dots had 62/65 moa rings like Eotech and a few others. The Marines use a 36 yard zero for this reason. I was trained by Marine Raiders and NSW, and they emphasized the importance of being able to take your weapon to max effective range. Fighting less than stellar trained men with AK's in the desert I learned to utilize the max range theorem and its importance. We had the enemy out-matched. In the real world you do not want the enemy to advance any closer than the range of your rifle: if you are out-matched you should be moving in the other direction.. [/QUOTE]
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Why would you not sight in at 100 yards?
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