I need some help. I was shooting my 224 Valkyrie 20” AR today. I’m shooting suppressed and worked up a couple loads with CFE, 27.0 & 27.2 gr 80.5 Berger’s and running an avg of 2784 FPS. These seem to group decent at 100 so I decided to see what I could do with them at 200. Now I would normally need about .3 mil adjustment but to my surprise I was hitting .6 mils high with that correction. So I returned my scope to zero (100 yard zero) and shot another group and that group was approx 1” high at 200??? Any clue why that would be?
Help: My 224 Valkyrie sighted at 100 shot 1.5” high at 200?
- Thread starter Steved1911
- Start date
It’s 2.81” over the center of the bore. Is that too high on an AR?
Running a Schmidt 3-20x50 PMII mounted with a Larue LT-104 QD Mount. If that helps any.
TAJ45
Silver $$ Contributor
I have no experience with ARs specifically but having an understanding of the straight line of sight and how it relates to the parabola of the bullet path and gives the foundation.
The bullet will fall through the line of sight twice, remembering that once the bullet exits the bbl, it begins to fall immediately.
Sometimes a scope mfr will have a diagram w the instructions. I'm sure there is at least a hunnert or so online not even counting YouTube.
Consider a mounted scope and envision a straight line going to your bull. Rifle is solid in a rest. If you put that scope in ( and I'll exaggerate for effect here) a mounting system that is 6" taller, parallel lines never converging, the aim point will be 6" high as well.
Because of gravity, the rifle BORE will be pointing"up", over the desired zero, regardless of distance, to get the bullet on target.
Therefore the line of sight usually will intersect bullet path once between the scope and, say, a hundred yds. However at the 100 yards the bullet will intersect the second time, at "zero" and if punching paper, continue to fall creating the need for "hold over" for whatever additional distance to make a hit.
This is why we can bore sight around 30-40 yds and be on paper. This is generally the first convergence area of bullet path and line of sight at a hundred. Z
Hope this isn't too murky and I'm sure if I mistated something, one of our sharp buds will help me out.
Edited again to add the point blank method of bore sighting to get on paper.
The bullet will fall through the line of sight twice, remembering that once the bullet exits the bbl, it begins to fall immediately.
Sometimes a scope mfr will have a diagram w the instructions. I'm sure there is at least a hunnert or so online not even counting YouTube.
Consider a mounted scope and envision a straight line going to your bull. Rifle is solid in a rest. If you put that scope in ( and I'll exaggerate for effect here) a mounting system that is 6" taller, parallel lines never converging, the aim point will be 6" high as well.
Because of gravity, the rifle BORE will be pointing"up", over the desired zero, regardless of distance, to get the bullet on target.
Therefore the line of sight usually will intersect bullet path once between the scope and, say, a hundred yds. However at the 100 yards the bullet will intersect the second time, at "zero" and if punching paper, continue to fall creating the need for "hold over" for whatever additional distance to make a hit.
This is why we can bore sight around 30-40 yds and be on paper. This is generally the first convergence area of bullet path and line of sight at a hundred. Z
Hope this isn't too murky and I'm sure if I mistated something, one of our sharp buds will help me out.
Edited again to add the point blank method of bore sighting to get on paper.
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Got ya. Thanks for the advice and will certainly keep digging. I do get what you are saying tho. Will need to look into that on my setup. Thanks!
Yes it is. And I agree, Strelock was showing me .38 come up. That’s why I was confused at the results.
Nope, thinking back... I’m not sure I did. That may be exactly it. Will try that first since it makes the most sense and the easiest fix. Thank you for taking the time!!!! Awesome!!!
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