zero on a 20moa rail at 100yards?

wingsuit

wingsuit

Regular
Rating - 100%
11   0   0
Location
Vancouver bc
took a recently purchsed rifle to the range today. I had bought the rifle and scope/rings seperate, and found that I ran out of range and even with my scope dialed as low as it could go it was about 10 inches high at 100 yards.

I'm sure I've just done something stupid, but any tips for what to be careful of or double check? Its a build off a rem 700 action with a 20moa rail and a nightforce 3.5-15x
. I know its a long range rifle, but am I wrong to assume I should still be able to get a 100yard zero with a 20 moa rail on?


picture makes it easier to see if I might have missed something... so...

hit_high.jpg
 
Factory actions are not that precisely machined on the outside and it seems you don't need a 20 MOA base.
You can either shim the front of the base or switch out the 20MOA base to a flat one.

FWIW you only need 35 or so minutes to get on at 1000 yards and even with a flat base you will still have (roughly) 100MOA...Which should be good for a bit over 1500 yards! :p

I never bothered to look, but is it possible to mount a one piece base backward on a Remington?
 
Is your NXS a Zero Stop model? That may be one thing to check. You should be able to get much closer to a 100 yard zero than that. I have 3 rifles with 20moa rails, and all can get down to a 100 yard zero even with scopes with 50moa adjustment.
 
When you buy a scope with 60 minutes of vertical adjustment, it does not mean you have 30 down and 30 up.

20 minute rails are too much for most scopes to be used at 100M, in fact I cannot even use mine at 300M.

Most cartridges and bullets only need about 25-28 minutes of adjutment to take you from 100 to 1000 yards. TAPERED BASES ARE NOT NECESSARY!!!

I fell into this trap myself... I no longer use tapered bases.
 
Definately the zero stop. Your top turret is taller and tapered compared to a regular NXS turret, the mark of the zero stop model.

I am currently running a +40MOA rail on my .308 so I can shoot beyond 1000 with ease. I still have a complete revolution of the dial left below my 100 yard zero.

If you have the room to stretch her legs beyond 1000, why would you let a little thing like a straight base stop you. I enjoy the ability to dial in the correction from 100 to 1760.
 
The 1000 yard dope being thrown out here is low for a lot of common 308 loads. A 175 SMK fired at 2600 fps. (common factory match load) requires over 40 MOA, especially when the temperature drops. And why is the limit only 1000 yards? People are stuck thinking only is terms of shooting matches, it would seem...

What if he someday wants to shoot further than that if he has the opportunity to so? What if at some point he wants to re-barrel to a caliber that stays supersonic much further out than a 308?

A lot of high-end scopes do zero closer to the center of travel range without a tapered base. With my PH 5-25x, the scope was topping out on the 20 MOA base before giving me enough elevation to make it to the 1700 yards or so where my 6mm Crusader goes subsonic in the summer heat. And who is to say that the bullet would not remain stable beyond that as Jerry's did with his .223? A 45 MOA base gave me enough elevation, but the scope was still topping out long before completing the second revolution on the dial.

No, get the base with the amount of taper that lets you get the most travel out of your scope while still being able to zero at the range you want and still having room at the bottom for differences is zeros between different loads and different calibers. That's planning ahead. Better to have and not need than to need and not have. A zero cant base gives nothing but more limited scope travel when using a high-end tactical scope like the one he's using.
 
Obtunded said:
When you buy a scope with 60 minutes of vertical adjustment, it does not mean you have 30 down and 30 up.

20 minute rails are too much for most scopes to be used at 100M, in fact I cannot even use mine at 300M.

Most cartridges and bullets only need about 25-28 minutes of adjutment to take you from 100 to 1000 yards. TAPERED BASES ARE NOT NECESSARY!!!

I fell into this trap myself... I no longer use tapered bases.
Click to expand...

Obtuned for all your expertise, you sure do say some weird silly stuff. Most likely the OP has his zero stops set high, which clearly he has since you can see that in the pic of his scope. You can also see he is shooting a .308, which even without going to my DOPE i know takes 40 MOA to get to a grand from my 100 yard zero. And furthermore, my identical Nightforce scope to the OP has 63MOA available up from my current 100 yd zero, which just lets me get to 1300 yards with my 20 MOA rail.

So how many of the statements in your post are just patently false or incorrect?
 
On my Savage 308 with a 20MOA rail I get a 100 yard zero with an extra 2moa of movement left in the scope. At 1025 yards I need 38 MOA of up to get it on target. With my 4200 Bushnell Tactical thats not a lot of left over movement at 1025 yards(46.5 moa of total adjustment). Glad I got the 20MOA rail:D Wish I had 100+MOA to play with;)
 
Redpoints said:
Obtuned for all your expertise, you sure do say some weird silly stuff. Most likely the OP has his zero stops set high, which clearly he has since you can see that in the pic of his scope. You can also see he is shooting a .308, which even without going to my DOPE i know takes 40 MOA to get to a grand from my 100 yard zero. And furthermore, my identical Nightforce scope to the OP has 63MOA available up from my current 100 yd zero, which just lets me get to 1300 yards with my 20 MOA rail.

So how many of the statements in your post are just patently false or incorrect?
Click to expand...

Having a bad day Redpoints?

None of Obtunded's points are false.
Counterpoints are interesting.
Insulting replies (even if they are right)....Not so much.

You are probably right about a misadjusted zero stop, but that doesn't license you to be a dik.
 
My scope, a S&B 4-16X has 130 cm (about 52 MOA) of elevation and with the 20 minute base I have a 200 yard zero with the elevation bottomed out, which works out quite nicely. All of my elevation is useable, and my .308 loads reach out well beyond 1000 (I've shot it out to 1200) with a center hold. Using all of the elevation and holding off with the mildots might give me a mile, if I saw the point, which I don't; the group at that range would be so big as to be meaningless. In my experience it takes about 30 MOA to get zero at 1000 with a .308.
 
X-fan said:
Having a bad day Redpoints?

None of Obtunded's points are false.
Counterpoints are interesting.
Insulting replies (even if they are right)....Not so much.

You are probably right about a misadjusted zero stop, but that doesn't license you to be a dik.
Click to expand...

Perhaps he didn't say in the most diplomatic way, by yes, most of that post was plainly wrong. Sorry, but even with one of the new 155 bullets, you need some pretty optimum conditions and pretty high velocity to only require 25-28 MOA of elevation from a 308 Win. A lot of details seem to have been missed, maybe due to the late hour and lack of sleep...

Most of your post was also out to lunch...

X-fan said:
Factory actions are not that precisely machined on the outside and it seems you don't need a 20 MOA base.
You can either shim the front of the base or switch out the 20MOA base to a flat one.

FWIW you only need 35 or so minutes to get on at 1000 yards and even with a flat base you will still have (roughly) 100MOA...Which should be good for a bit over 1500 yards! :p

I never bothered to look, but is it possible to mount a one piece base backward on a Remington?
Click to expand...

Factory actions being that imprecise to prevent you from zeroing a NF on a 20 MOA base... I don't think so Tim! And shimming the front of a 20 MOA base??? Its cartoonish on the best of days. Its analogous to cutting the doors on a cupboard to make them fit crooked instead of just adjusting the hinges. Don't do stuff like this, its a Homer Simpson fix.

No! you won't get anywhere near 100 MOA of travel least with a zero can't base and that Nightforce scope. It does center close to the center contrary to what both of you say.

And you can't put a Remington base on backward. The screw holes don't line up and the back of the receiver is flat-ish while the front is round.


Why people would give a newb such ridiculous advice is beyond me. Lack of familiarity with the equipment in question or to spread some kind of rail cant ideology? A zero can't base may work well with the 1/8 MOA click scopes used in Benchrest, F-class or other fixed distance shooting games (I really don't know, and I'll be the first to say it), but it isn't the proper setup for a tactical rig with a 1/4 MOA or 0.1 mil tactical scope, which is why companies like Badger offer canted bases. If people didn't know the answer, why spout out random crap? The solution was simple and obvious to anyone using this type of setup.
 
No, the "solution" was only obvious to people with scopes that have a zero stop similar to the OP's setup. I know (tested on the range with a half dozen different scopes on the same rifle) that a 20 MOA base on a 700 in 308 will need to be adjusted to get a 100 M zero. And Jennis wasn't far off, without the adjustment, using 168 gr bullets, it will be about 16" or so too high. If I use a 10 MOA base it is much closer, but still around 3-5" too high. Burris rings and inserts let me tune the mounting to get a 100 m zero with the scope bottomed out for elevation, leaving me all of the elevation for distance ( the scope on there right now is a B&L 4000 8-32x40 with 1/8 adjustments. I change scopes a lot, and usually use this rifle for test as it is consistently accurate no matter what retarded thing I dream up). With a scope with enough elevation, you wouldn't have to do this for a parameter set from 100-1000m. If you want to go further, you may have to adjust the mounts anyway. I recall an adjustable mount from a few years ago, set up to allow 200 yd to over 1 mile. Very cool mounts, hand built. FWIW - dan
 
I was referring to the orig poster saying he had the scope bottomed while shooting 10 inches high at 100 yards.

I have a 5-22XNSX on a 20 MOA base that has a bit over 91MOA of up travel....Do I have the Remington with the most out of whack tolerances ever made...I doubt it.
Yes, I know the 3.5-15X has a few more minutes of travel.
Yes, I own numerous Nightforce scopes (no 3.5X15s) and am intimately familiar with the equipment. I never considered the Zero stop until Longbomber mentioned it.

My buddy has a shimmed 20 MOA base on his 308 (the other end).
The shims and base are bedded in black epoxy and you would never know the trickery existed. Nor is the setup compromised in any way.
Other than this rifle I can't be bothered with the inadequacies of the 308.

Information bleed from guys involved in multiple levels of shooting sports...Sure.
Poorly thought through...Sure. Randomly spouted crap?
Hardly.

As to randomly spouted...Feel free to apply my comments to Redpoints to yourself.
Multiply and rotate if you like.
 
You must log in or register to reply here.
Back
Top Bottom