Question on MOA bases

[Knife Edge]

One of my setups requires nearly 90 MOA of elevation to run out to a distance I want to work with. I have a Leupold VX-III 6.5-20x50 LR target and several sources state this rifle had 94 MOA of internal adjustment. If I add a 40 MOA base and take half of the available internal adjustment it gets me real close to 90, 87 theoretically.

Assuming a perfect world the scope would have 47 MOA up and 47 MOA down from mechanical zero. With a 40 MOA base it potentially only leaves 7 MOA left to drive the POI far enough down to get a 100y zero. Is 7 enough to play with or am I on the ragged edge of not being able to get a 100y zero.

Thanks in advance.

[DirtyDave]

Do you have to have a 100yd zero? With a setup like you are talking about, how much time do you spend shooting at 100yds?

[Knife Edge]

No, I haven't even bought the base yet. Ill probably set a 200y zero when I get it. I have bought other firearms where the rail was sufficiently out if line with the barrel that I only had 1/3 up and a massive 2/3 of total travel down. I ended up putting a 20 MOA base on the rifle to fix it. The current build is off a R700 platform, simple so everything should be straight. Just concerned that if I throw a 40-MOA base on and something is slightly off i may have to actually hold under with the reticle at 200y because the turret is bottomed out.

[HK Dave]

Wow... just out of sheer curiosity, wacha shooting and how far you shooting that it requires 90 MOA or nearly 26 MILS of elevation? That's epic!

[Knife Edge]

Wow... just out of sheer curiosity, wacha shooting and how far you shooting that it requires 90 MOA or nearly 26 MILS of elevation? That's epic!

[Merc1138]

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If you're really going to be shooting at those distances, are you going to be shooting for accuracy at 100 yards as well? Just hold over or something.

[wash]

Where have you found a 2,000 yard range?

[Knife Edge]

BLM land a mile east of a family estate in NV.

[dieselpower]

still doesnt explain why you want a 100yr zero if you are shooting 2000 yards?

[Knife Edge]

still doesnt explain why you want a 100yr zero if you are shooting 2000 yards?

Good point. Ammo too expensive to waste at that range and I'd likely develop a load at 300y. I'm over it, 40 MOA base it is and now off to you tube to learn about "bedding a base." Oh the joys of bolt guns.

[dieselpower]

You can't have both. Its possible to use a LaRue mount that maintains zero after removal and use two optics, but I find it hard to believe even a LaRue will hold a 2000 yard zero after removal and re-mount.

[Knife Edge]

...I find it hard to believe even a LaRue will hold a 2000 yard zero after removal and re-mount.

It couldn't. In a world of bedding bases, lapping scope rings and bedded actions the tolerances aren't there; if so people wouldn't bed scope bases. Aside from -06 and 22-250, I'm very new to the magnum bolt gun world; can recognize one 5 out of 8 times.