What scope base to get 80-90 gr too 1000?

[BigRon]

Was at the range this week and decided to try 950 yd gong. I punched it in my shooter app and it said up 27.9 but I was 5 MOA shy. Shooting a NF NXS 12x42 scope with a 20 moa base. What is everybody using to get to 1000? I'm shooting 82 gr Bergers at 2800 FPS.

 

[boltman223]

80 smk's in two different barrels going 2800 and 2885 fps.

I was able to get to a 1000 with a zero moa base and NF nxs or my sightron siii.

 

[kzin]

that scope is speced for 22.5 up
add 20 gives you 42.5 up

you only got 26?

either your 20 moa base isn't or your scope is not close to centered

 

[alf]

Was at the range this week and decided to try 950 yd gong. I punched it in my shooter app and it said up 31 but I was 5 MOA shy. Shooting a NF NXS 12x42 scope with a 20 moa base. What is everybody using to get to 1000? I'm shooting 82 gr Bergers at 2800 FPS.

Your problem is the scope, it only has 40 MOA of total adjustment. Most everything I use for 1K and beyond plinking has a 40 MOA base and a 5.5-22 NXS on top, which has 100 MOA on tap.

 

[BigRon]

So, a 30 MOA fixes the problem? More than likely i'll never shoot a match at 1000 yd but might want to ring steel.

 

[alf]

The problem of going too big on the base is not being able to get a "normal" 100 or 200 yard zero.

 

[kzin]

So, a 30 MOA fixes the problem? More than likely i'll never shoot a match at 1000 yd but might want to ring steel.

yes
IF your current 20moa is really 20moa

 

[BigRon]

I removed the scope, removed the base and measured rear and front and even tho it didn't say it was 20 MOA, it was same measurement as one that stated it was 20 MOA. I can't imagine ordering anything less than a 20 MOA when I put the rifle together.

 

[kzin]

I removed the scope, removed the base and measured rear and front and even tho it didn't say it was 20 MOA, it was same measurement as one that stated it was 20 MOA. I can't imagine ordering anything less than a 20 MOA when I put the rifle together.

Then the added 10 moa makes the math work for 1000 back down to 100yds.

That also implies the scope is shooting about 15moa lower than mechanical center. Are you confident it has 40-45 moa of working total adjustment?

You might want to keep the base but use 'adjustable' rings?
https://www.burrisoptics.com/mounting-systems/rings/xtr-signature-rings

 

[BigRon]

It has 25 MOA under Zero as it sets. So its pretty close to mid point.

 

[kzin]

It has 25 MOA under Zero as it sets. So its pretty close to mid point.

25 under zeroed for what yardage?

with or without the 20moa rail?

The short range zero with the rail should be well below center. Like only having 5-10 under leaving 35 or more to move up

If I understand what you're saying you may want another 15 for a total 35moa rail

To cover over 30 moa range with a scope with nominal 45, maybe actually less, doesn't leave a whole lot of room for error on either end.

 

[BigRon]

I'm sorry, I try to keep a 300 yd zero on all my rifles. Its just easier for me to go to 600 and back.

 

[kzin]

I'm sorry, I try to keep a 300 yd zero on all my rifles. Its just easier for me to go to 600 and back.

at the range you had 23 moa of bullet upward adjustment

by '25 under' do you mean that same direction or the bullet downward direction?

It's looking like you really want 15 more moa in the rail.

10 or 20 will PROBABLY work but be tight on one end.

I'm guessing that putting on a 40 and losing your 300 yard zero would be the worst outcome.

 

[wholman]

Burris signature rings will fix your problem.

 

[Geno C]

The 12-42 is the problem as stated above. Also stated above are the Burris rings. That's he exact route I went with mine.

223ai on a savage action with a 20moa base and I was still zeroed at 100 and only had 18moa up left on the scope. I played with the inserts and now I am 6moa from the bottom when zeroes at 100. Not too close to the bottom but plent of up left to reach as far as this little round wants to go

 

[Eric Leonard]

The 12-42 is the problem as stated above. Also stated above are the Burris rings. That's he exact route I went with mine.

223ai on a savage action with a 20moa base and I was still zeroed at 100 and only had 18moa up left on the scope. I played with the inserts and now I am 6moa from the bottom when zeroes at 100. Not too close to the bottom but plent of up left to reach as far as this little round wants to go

if you have 25 MOA you arent using you can either have a custom tapered base made or use the Burris rings to get 15 more MOA adjustments up and still have 10 down from your current zero..

a friend of mine uses the 12-42 NXS on a 308 and he had a base ground with a 33 MOA taper and can zero at 100 and reach past 1,000 yards with the 175 SMK,I will ask him but I think Warne made the base for him,,

I think his action isnt flat on top or his barrel is pointed down a little,,with a 33 minute base the 12-42 should not zero at 100 yards but it does on that rifle,,

 

[carlsbad]

The 20 moa rail should work. As the guy above said, you're only getting 26. with a 30 you shouldn't be able get a zero. But since you're 20 is efffectively only +6, the you should be able to get a zero with 30.

I'd go with burris zee rings instead and try to figure out why you don't have what is advertised.

--jerry

 

[Zero333]

I have a savage action that has about 5 mils (16.75moa) backwards cant. I put on 2 good known scopes and both were 5 mils shy of being centered.

Just because the scope doesn't zero near the middle doesn't mean the scope is the problem.

For LR I like at least 30+mils (100+moa) of total elevation in the scope (about half of that is the usable elevation).

If your scope has only 50 to 60 moa total elevation, then a 30 moa base is the safe choice.