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PostPosted: Thu Jun 13, 2019 6:11 am 
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Joined: Thu Feb 27, 2014 2:36 pm
Posts: 293
Home club or Range: Wey Valley
Can anyone tell me what the largest built-in scope rail elevation I can fit, yet still obtain a zero at 100 yards?

My scope has 50MoA of elevation adjustment. I want to shoot it out to 1000 - 1200 yards and I normally use the GGG 155gn ammunition which departs with an mv of about 2720 from my rifle.

Even with a 20MoA rail fitted to the rifle, I've run out of elevation adjustment and have to aim-off using the reticule. This isn't ideal as the rifle is used by Club novices and telling them which particular hash mark on the reticule to use is a little complex.

My solution is to fit Burris Signature rings and add some additional elevation using the offset inserts they provide. Question is how much offset to use - it's possible to add 0, 5, 10, 15, 20, 25, 30 or 40 MOA of cant in the scope mount in addition to the 20MoA on the scope rail. But I'd like to still get a 100 yard zero for the rifle as well.

All the different geometries and permutations do my head in!

Triffid


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PostPosted: Thu Jun 13, 2019 9:01 am 
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Joined: Wed Mar 06, 2013 5:32 pm
Posts: 1839
Home club or Range: Harlow TAC, NRA, BSRC
I would think the scope is not the right one for your needs.

I don't really know your scope but I would think if you can get 100 and 1200 within your adjustment range you'll have very little windage adjustment available at either of the extremes and that could be an even bigger issue especially at 1200.

Might be better to buy a different scope with greater adjustment range (I have a Leupold LR scope with 75moa adjustment just for this sort of situation - I used to use it for PR at 100-600 with the occasional 1000yrd thrown in, it worked well). As you mention you can get height adjustable rings to add to your 20moa rail but that might just be causing a different issue.

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