I currently own a Leupold scope that has 71 MOA of vertical adjustment (advertised). Is this enough adjustment for a 20 MOA base if I zero at 100 yards? My rifle is a 308 with a MV of 2500 fps using Federal 168g Gold medal match ammunition.
Rifle Scopes Scope adjustment for a 20 MOA base
- Thread starter BruceR
- Start date
Re: Scope adjustment for a 20 MOA base
Is your question: "Can I zero at 100 yards if I use a 20 MOA base with a scope that only has 71 MOA of elevation travel?"
If so:
71 MOA divided by 2 = 35.5 MOA down elevation.
35.5 MOA minus 20 MOA leaves you 15.5 MOA from the bottom stop when the barrel axis and optical axis are parallel.
Right?
Is your question: "Can I zero at 100 yards if I use a 20 MOA base with a scope that only has 71 MOA of elevation travel?"
If so:
71 MOA divided by 2 = 35.5 MOA down elevation.
35.5 MOA minus 20 MOA leaves you 15.5 MOA from the bottom stop when the barrel axis and optical axis are parallel.
Right?
Re: Scope adjustment for a 20 MOA base
Enough for What?
To shoot at 1k you will need approximately 40-42 minutes of adjustment to make it! Although the 168SMKs aren't gonna do it very well, so, you may wanna think about sticking to 800 yards or so or changing bullets.
A 20 MOA base and 71 minutes of adj should get you everything you want with a .308.
Even if you only get half of the adjustment 35.5 MOA + 20 MOA base you will be able to get to 1100+ yards or so with the right bullet.
If this is the wrong answer, then I guess I have misunderstood your question.
Good luck!
Enough for What?
To shoot at 1k you will need approximately 40-42 minutes of adjustment to make it! Although the 168SMKs aren't gonna do it very well, so, you may wanna think about sticking to 800 yards or so or changing bullets.
A 20 MOA base and 71 minutes of adj should get you everything you want with a .308.
Even if you only get half of the adjustment 35.5 MOA + 20 MOA base you will be able to get to 1100+ yards or so with the right bullet.
If this is the wrong answer, then I guess I have misunderstood your question.
Good luck!
Re: Scope adjustment for a 20 MOA base
You answered my question, thanks for the math and explanation.
I was thinking the same thing but I wasn't sure if there was something else I needed to factor in.
You answered my question, thanks for the math and explanation.
I was thinking the same thing but I wasn't sure if there was something else I needed to factor in.
Re: Scope adjustment for a 20 MOA base
Thanks for the quick reply, I do not have plans on going past about 500-600 yards.
Thanks for the quick reply, I do not have plans on going past about 500-600 yards.
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