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"Between Clicks" sighting in suggestions!

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:35
cornhuskid View Drop Down
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Good Morning!

I have an interesting "problem" with sighting in my Hensoldt. I sight in for 200 Meters. This scope has 1CM clicks, and at 200 M I am almost exactly 1CM high and 1CM right. Yep, a 1/2 a click. Damn... The mounts are Seekings with a 20MOA base. No adjustments there.

This rifle WILL hold about a .25 group at that distance off the bench, so i know the rifle is fine.

Thoughts?


Jeff
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:40
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To have the rare rifle that can shoot .25 at 200 meters and you have a problem. Just adjust your aiming point. My eyes are not good enough to determine 1/8" at 200 meters. You can always do fine adjustments by adjusting you powder load to back the speed down 2-3 fps.



Edited by 3_tens - September/15/2010 at 09:43
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:43
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Originally posted by 3_tens 3_tens wrote:

To have the rare rifle that can shoot .25 at 200 meters and you have a problem. Just adjust your aiming point. My eyes are not good enough to determine 1/8" at 200 meters. You can always do fine adjustments by adjusting you powder load to back the speed down 2-3 fps.

when would that ever miss a target?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:44
cornhuskid View Drop Down
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Usually mine aren't either, but this scope is amazing.  (Hensoldt 4-16 x 56 FFP)
 
I'm not so concered about close diatances (500 M and less), but we shoot out to 1300 M , which would be at least a 6.5 CM error just in the setup.  (much less my lousy form!)
 
j
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:44
cornhuskid View Drop Down
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sorry - "distances".  I can't type either.
 
:)
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:46
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Cornhuskid, this is an interesting situation. Exactly as in my new thread M1 or M2 turrets, so I would be interested in how this problem is resolved
Unfortunately I cannot agree with 3tens, as such a problem would bug me and rattle my confidence.
So now what?
I can only say that a solution has to be found with the base. Maybe if you could post a pic?
A decent machinist may be able to shave the base?
I could live with the elevation issue, but not the windage.
Alternatively you may have to change your base to one with windage screws, typically the Leupold????
keep us informed.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:48
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maybe try moving the mounts a small amount and see where that leads you.  Back just a hair or forward.   I dont' know.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:50
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What gun is this?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:51
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8's by slowing the bullet you will reduce the spin drift. Thus not only droping the elevation but bring it back to alingment.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:56
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This is a custom 264 Win Mag from Quarter Minute Magnums.  The guy does amazing work.
 
 Here is a link to my rifle on his page when i had the S&B
 
 
I won't be messing with the load.  DAMN accurate.
 
These are Seekins 34MM rings.  (pic rail).  I don't know of any adjustable options for this.
 
Thanks guys...
 
Jeff
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 09:58
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 Have you checked what happens at 300 or beyond? This could be a parallax issue. Going to longer ranges would help confirm what's going on. I know this is a Hensoldt, but I'd do the "head wag" test when adjusting parallax to make absolutely sure that reticle isn't moving against the target.

It may just be that you're stuck with a rare combination there: An excellent optic on top of an accurate rifle shooting a great load. But one that just happens to have relatively coarse adjustments. If you are handloading, I'd go with the advice to drop a few fps.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 10:02
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Thanks jono...  I'll get to play with it more after season here.   Off to Western WA for Deer in mid October!
 
j
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 10:03
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Scratch that...  Western WA is in late Oct, EASTERN in mid...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 10:20
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US optics makes windage adjustable picatinny rings.  Might could go that route
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 10:25
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Dang.  30, 35 and 40 mm.  I need 34mm...
 
Thought we had a solution!
 
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 10:30
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Well that sucks.  I thought for sure they had 34mm.  My bad.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 11:51
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No problem.. I appreciate the attempt!
 
:)
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 11:57
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I wouldn't worry about the elevation. Elevation will change more than your current misalignment depending on the temp outside. As for the windage, if your rifle is a right hand twist barrel set your scope so that you hit just to the left of the target rather than just to the right. The impact variance you are seeing at 200m will be offset to some degree at longer ranges by spin drift. When you are talking about accuracy at this level, you aren't going to get neat solutions at every range and temperature. If you really need more accuracy, you need a scope with smaller adjustments.

Just my 2 cents...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 12:01
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Thanks Graysteel...  I'll adjust it to the left one click and then check my Delta III software to see if i can get a 225 M zero to match the 200 M POI.  Have to play with that a bit so it's good waaaaaay out there.
 
Excellent!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 12:29
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Graysteel...
 
OK - so if I look at this way, it's an advantage.  I have a fast twist barrel (for a .264) of 1 in 8".  So...  at some point that 1CM left at 200 M will re-zero, and then slowly move back right.  This is cool.  I wonder if i can find a doc on spin drift that would allow a "web" entry to show it's effects?  I could mess with Delta III, but would need to calc the diff between the results with and without the spin selection.
 
Thanks again.  I'm looking at this in a better light now.
 
Jeff
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 13:57
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I don't know if they could/would do it, but it might be possible for USO to mill a 35mm set of rings undersized to 34. If anyone might be willing, it would be them.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2010 at 14:40
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That's a thought...  I'll look into that after my hunt.  I love this site.  Always good ideas!
 
j
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2010 at 13:50
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Using an elevated base, you can move the scope forward 1/8, 1/16, or 1/32 inch which will raise the bullet impact a bit. This may help to get you in the zone elevation wise.
 
NOTE    It won't help on a non elevated base though for those out there not using a 10, 15, or 20 moa base.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2010 at 14:38
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Originally posted by cyborg cyborg wrote:

Using an elevated base, you can move the scope forward 1/8, 1/16, or 1/32 inch which will raise the bullet impact a bit. This may help to get you in the zone elevation wise.
 
NOTE    It won't help on a non elevated base though for those out there not using a 10, 15, or 20 moa base.


No. That's too simple and inexpensive of a solution. Big Smile
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2010 at 15:02
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Embarrased Oh silly me..... I keep forgetting the simple solutions are cheap and should be avoided at all costs. Roll on Floor Laughing
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