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Old 09-17-2020, 08:23 PM
Cactus Mike is online now
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Iron sight problem...



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1813 Anschutz rifle. Anschutz 7020(?) rear sight. Bought an Eagle Eye 22mm front sight to shoot higher scores.

Problem: the POI is 6 low with the elevation MAXED OUT. I suspect I need a variable height riser for the rear sight, or maybe there is another solution I havent considered.

Solution: The experience of the shooters in this forum will no doubt know what parts and where to purchase same.

Thanks in advance for your help.
Regards,
Mike Lyons
[email protected]
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  #2  
Old 09-18-2020, 02:10 AM
tim slater

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Mike,

That can happen with a taller foresight. You don't mention the distance, but a 4mm block under the rearsight should work at 100,or maybe beyond. Ca 2mm at the rearsight equates to the 6-7in drop at 100, so 4mm ought to be fine.

Centra and Tec-Hro both make nicely finished dovetail blocks that attach by grubscrews. Anschutz make one, but it's a split design and held by the clamping of the rearsight mount; I have one in my sight box, and it never stays still.

Variable height raisers are great, Centra Block Club get my vote. But, unless you need to raise both sights for neck comfort, a single 4mm block may be better. The lowest adjustable raisers lift the sights by 11 or 12mm.

Last edited by tim slater; 09-18-2020 at 02:19 AM.
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Old 09-18-2020, 05:49 PM
Cactus Mike is online now
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I sent you a private email...

Thanks for responding.
Mike
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Old 09-18-2020, 07:12 PM
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I ran into a similar situation. Here is a calculation that may help.

This is a simple calculator based on the formula " error ∕ distance front sight to target x sight radius = correction needed "

The important thing to remember is all units must be the same (inches not feet or yards) and expressed in decimal form ( no fractions )

This will give the height of the riser needed with the elevation were it is set now. Then you can measure how much travel the rear sight will go down, and add that to the minimum riser height. In my case I needed a 8 mm riser to be able to zero at 25/50 yards and dial out to 150+ yards. Just changing from 18 mm front to 22 mm requires at least 4 mm riser with everything else being equal.

Last edited by Southern1; 09-18-2020 at 07:20 PM.
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Old 09-18-2020, 09:17 PM
Cactus Mike is online now
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I sent you a private email...

Thanks for your response. If you have any ideas about where to buy a 4mm riser I would appreciate it.
Regards,
Mike Lyons
[email protected]
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Old 10-01-2020, 12:09 PM
Sandy22
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Quote:
Originally Posted by Cactus Mike View Post
Thanks for your response. If you have any ideas about where to buy a 4mm riser I would appreciate it.
Regards,
Mike Lyons
[email protected]
https://www.intershoot.co.uk/acatalog/Sight_Blocks.html (Second item down)
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  #7  
Old 10-18-2020, 02:42 PM
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Might try Neal Stepp at ISS:

http://www.iss-internationalshooters....com/index.htm

or Champion's Choice:

http://www.champchoice.com/store/main.aspx
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