enough elevation?

buckdeer

Active Member
Joined
Oct 24, 2003
Messages
36
Location
sarahsville ohio
hi guys i new to this game and these forums so can you give me some advice.


i am building two rifles one a 243 and the other a 308. i would like to try making a 1000 yd hit with these rifles. i purchased a 6.5x20 lr and a 8.5x25 lr both from leupold. if i sight these scopes dead on at 100 do these scopes have enough elevation adjustments to make shoots at 1000 using the turrents. thanks for any and all advice
 

clg9mm

Active Member
Joined
May 17, 2003
Messages
36
Location
PA
You'll need the 20 MOA base for the .308 unless you use mildot hold offs. The scope only has 72 MOA total. You'll need better than 36 MOA to get to 1000. Which is all you'll have if you are centered. .243 with a 107 SMK should get you there w/o and a little room to spare.
 

Nate Haler

Well-Known Member
Joined
Dec 27, 2001
Messages
189
Location
occupied, USA
totally depends on how much up you have left from your 100y zero, and what sort of loads you will shoot.

In the .308, you'll be wise to shoot the 175MK at 2,700 fps MV. That load will stay supersonic past 1,000y, and will need about 36MOA to get there.

If you'll use bullets with lower BC (ballistic coefficient), you will need to drive them faster.

Pick your bullet, chrono your preferred load or use a predicted velocity from a loading manual. Then input the data into one of the online ballistic software tools (several available, free), and see what the comeups will be.

Compare them to how much up you have left from your 100y zero, and there you go.

If you won't have enough, you can very effectively use mildots for holdover, if your reticle features them, or get a tapered base or adjustable scope rings (like the Burris Zee type with eccentric inserts).
 

buckdeer

Active Member
Joined
Oct 24, 2003
Messages
36
Location
sarahsville ohio
thanks for the advice, i was planning on using 95 to 105 bullets in the 243 and 168 to 180 in the 308. it will depend of course on how they shoot in my rifles
 

jeff 300

Well-Known Member
Joined
Mar 27, 2005
Messages
892
Location
corpus christi,tx
[ QUOTE ]
You'll need the 20 MOA base for the .308 unless you use mildot hold offs. The scope only has 72 MOA total. You'll need better than 36 MOA to get to 1000. Which is all you'll have if you are centered. .243 with a 107 SMK should get you there w/o and a little room to spare.

[/ QUOTE ]the leupold book reads that the scopes come with 90 moa may want look at the new book but a 20 moa base would still be nice
 

Trending threads

Recent Posts

Nightforce has great tracking capabilities, they are rugged, a bunch of elevation, holds zero forever, and reticles are designed for long range shooting. So if you are looking to shoot long distances constantly, then you need a scope that can take the abuse. -- gilmillan1


Culture Of Excellence At Nightforce Optics
By Len Backus

A high level of quality both in production and in service. Read More


Nightforce is such a solid combo of reticle, available elevation, glass that is good enough to shoot at the longest range you can dial. Nightforce has bullet proof construction that can handle the incidental horse rolling or some other rodeo action. -- bigngreen


Nightforce ATACR Scope Review
By Jeff Brozovich

The new NightForce ATACR is for sure a top choice for any long range shooter. Read More


The total package. Nightforce is the best I have used as far as turret feel and solid detents. I have never had one that didn't track right on and always return to zero. Nightforce NXS is the best value for everything I need. -- Broz


Nightforce Velocity 1000 Reticle Review
By Scott Shreve

I think Nightforce knocked it outta the park with this reticle! Read More

NightForce


Top