Rifle Scopes Elevation Adjument Question

[rigg51]

All of this is attempting to help me learn and determine if i should buy 0moa or 20moa base...

Scope = Bushnell 3200 10x40 mil (80in adjusment @ 100 yds)

Assuming that means 40 in up and 40 in down.....
Assuming a 168gr BTHP zeroed @ 200yds would be -49.9 @ 500yds

Does that mean that the scope would lack about 10" of adjustment?
So I would have to max out the elevation and then add hold over as well, or does the 80in @ 100yds "grow" with distance...like moa 3.6@100 // 36@1000

Thanks.

 

[jasonk]

Re: Elevation Adjument Question

Just get the 20moa base.

But as far as your question, you would not be lacking 10" adj at 500 yards. Remember, that 40moa up and down is at 100 yards, so yes that moa "grows" as your distance increases.

 

[sobrbiker883]

Re: Elevation Adjument Question

yes, the inch drop from your table needs to be converted to moa for your scope adjustment.

49.9 inches at 500 yards is 9.5 moa adjustment on your scope, and you'd have 30 ish more left (assuming center of scope). It'd make it close if you ever want to reach out to 1K. However, even if you do have enough travel for the elevation, if its maxed it limits your windage available then.

Just get a 20moa base and have fun. I'd buy 30mm rings with reducers for the 1" scope, because you sill upgrade that scope later if you stick with this sport.

 

[Guest]

Re: Elevation Adjument Question

Do a 20 min base an save yourself time an money.
1 moa at 100yds = 1.047,... at 1K yds 1 moa = 10.47"

If your in Huntsville, many folks in state to help an shoot with.

 

[Lindy]

Re: Elevation Adjument Question

Get the 20 MOA base.

If it actually has 40 inches of "up" adjustment at 100 yards, that's about 38 MOA, since 1 MOA at 100 yards is 1.047 inches.

It's going to take you approximately 4 MOA of "up" elevation to get a hundred yard zero, depending on your scope height above bore.

That would leave you with only 34 MOA, and that won't get a .308 to 1000 yards unless you live somewhere high or the temperature is very warm.

And if you plan to shoot to 1000 yards, it's better not to use the 168 SMK. You'd be better off with a bullet with a higher ballistic coefficient.

 

[rigg51]

Re: Elevation Adjument Question

ok thanks
so -49.9 @ 500 yds would be a little less than 3 mil?

 

[rigg51]

Re: Elevation Adjument Question

with a 20 MOA base I will still have enough adjustment to zero at 200 yds correct?

 

[Tyler Kemp]

Re: Elevation Adjument Question

Yes you'll be fine.