50 MOA internal adjustment + 20 MOA base?

[Donut]

[CSACANNONEER]

My question is: How can you zero you rifle at 100 yards and have the scope be set exactly in the middle of it's adjustment?

[Donut]

My question is: How can you zero you rifle at 100 yards and have the scope be set exactly in the middle of it's adjustment?

It wouldn't... It would be at -4 MOA from center with a 100-yard zero.

Right?

[buffybuster]

With a scope with 50 MOA internal adjustment (specifically, I'm loking at the Nikon Buckmasters 4.5-14), that gives +/- 25 MOA from “center”, right?

Assuming a 100-yard zero requires ~4 MOA (3.935, according to JBM) that would leave me 21 MOA of drop compensation before the scope bottoms out.

So with the 20 MOA base, that would give me an additional 20 MOA of drop compensation, for a total of 41 MOA-worth of compensation from the 100-yard zero, correct?

So with a load that theoretically (according to JBM) has a ~39 MOA drop at 1,000 (from a 100 yard zero), the 50 MOA internal adjustment + 20MOA base should be good to go at 1k, right?

Or do I have my math all messed up?

Theoretically, if after the scope is mounted that everything is centered, it should work. But that leaves you perilously close the bottoming out at your 100yd zero. May or may not be able to get a 100yd Zero. Only way to know, is to try it. This is if the scope actually has the advertised amount of adjustment. Some scope models have more, some have less.

Additionally when you are close the the end of reticle elevation travel, you lose windage adjustment and sometimes the adjustments become inconsistent.

It would be better if the scope had 60moa of total adjustment, to stay away from the extreme ends.

[Donut]

Theoretically, if after the scope is mounted that everything is centered, it should work. But that leaves you perilously close the bottoming out at your 100yd zero. May or may not be able to get a 100yd Zero. Only way to know, is to try it. This is if the scope actually has the advertised amount of adjustment. Some scope models have more, some have less.

Additionally when you are close the the end of reticle elevation travel, you lose windage adjustment and sometimes the adjustments become inconsistent.

It would be better if the scope had 60moa of total adjustment, to stay away from the extreme ends.

Thanks!

Since I haven't bought the new scope yet (gotta sell some stuff, first), I think I might have to pass on the Nikon, then. The Millet TRS-1 looks promising, I think I might look into that one some more.

[maxicon]

The main benefit of a 30mm tube is more internal adjustment, so that's worth considering as well.

[Toten Kopf]

50 MOA is really poor for either windage or elevation. Look for a scope that has at least 120 MOA in adjustments and with 15 MOA per turret revolution.

Makes things a lot easier when making longer shots. Oh, having a scope that let's you index the turrets is a "big" plus.