Problem absolute dead-zeroing my BR rifle/scope

[jelenko]

If I move the windage turret 1 click to the right and POA is exactly on the X-dot, the POI moves to the right beyond the X-dot.

I'm not familiar with the target you're shooting on, but if the POI moves [noticeably] more than 1/8" with one click of windage, the scope is out of spec.
As mentioned, do a box test. If the scope isn't tracking, time to call March.

 

[Cassidy]

Thank you, jelenko! Been thinking of doing that.

 

[RGRobinett]

Maybe try Burris rings with inserts. Instead of placing the inserts exactly at 12:00 and 6:00 you can locate them a little “off kilter” which will add the slight bit of windage you’re wanting.

Possibly, however, unless in a tunnel/vacuum, the gremlins will [likely] prevail: we aim at the target IMAGE, not the actual target, and the image is subject to displacement due to refraction. A dead-zero is nearly mythical . . . likely to change any second. RG

 

[Kracken McGraw]

Take the scope off of the gun and put it back on until it lands in the spot you want.

I’m curious at how this changes things if you have good bases?

 

[RGRobinett]

I just went thru this with a 22lr, moved the rings into 3.5 inch range. Which centered them on the tube each side of the turrents. Could the base/receiver be stressing the tube, with the wide ring spacing. Which in turn effects the erector tube movement? And of course follow torque specs for ring/scope.

Yes. With the rings positioned over/near the erector tube gimbal joint, or, too near to the turrets, over torquing can interfere withe click values. Over torquing is not a good thing anywhere. RG

 

[jackieschmidt]

If you shoot in ANY wind at all, you'll stop worrying about this. Why does it matter, if the wind forces you to hold off more than that most of the time, anyway? Also...the wind might also CORRECT your issue. This is a beginner question and there's absolutely NOTHING wrong with that. So, I'm honestly trying to give you a true and real world answer, politely. I'm NOT trying to be a SA at all...just the truth.

Conditions are always changing and almost always, worth way more than the 1/8" you're worried about. So, they may well be why you're having this "issue" to begin with and you most certainly will have to learn to deal with conditions during your shooting...to do any good, anyway.

Top shooters are not adjusting turrets for that amount often, if ever.

In case you come back with..."it's always like that", then I have a very clear answer.. and that's to shoot in real world conditions if ya want to improve. That and always use wind flags of some sort.

I'm a competitive shooter of about 25 years...fwiw.

^^^^^^^
The only time I will touch the turrets on a scope in 100200 yard score shooting is if the wind starts coming in at a consistent hard push that takes the bullet impact clear off the paper.

If you start screwing around with it too much, you will get lost in the 7 minutes you have to shoot the target. Well, maybe not every body, but I’m not that smart.

Heck, most of the time I’m not aiming at the middle any way. I am aiming at a point on the target that allows the condition to “walk” the bullet into the X.

There is in all likely hood nothing wrong with the OP’s scope. Like many shooters that “we” encounter on a regular basis, he does not quite understand just how much bullets get kicked around in the conditions.

Like Randy said. The variables can be mind boggling.

 

[Tommie]

Possible, however, unless in a tunnel/vacuum, the gremlins will [likely] prevail: we aim at the target IMAGE, not the actual target, and the image is subject to displacement due to refraction. A dead-zero is nearly mythical . . . likely to change any second. RG

I totally get it Randy. I was just trying to help the OP get his desired results.

 

[dellet]

Maybe it’s because I’m not that much of a high end shooter, but it seems like the changing of head position would be enough to compensate for the half click adjustment needed.

Would a stock ajustment help if dead center was really needed?

 

[SSeal]

I’m curious at how this changes things if you have good bases?

I said that a little tongue in cheek. The truth is the tiny amount we are talking about (1/2 of a 1/8 click) is well within the variance of a scope being taken off and remounted.

 

[RGRobinett]

Maybe it’s because I’m not that much of a high end shooter, but it seems like the changing of head position would be enough to compensate for the half click adjustment needed.

Would a stock ajustment help if dead center was really needed?

Proper parallax adjustment should eliminate eye position being an issue. Parallax is equivalent to sight alignment: it's either perfect, or it's not, but adjusting a scope to correct parallax is easier than keeping sights aligned.
Parallax correction should be accomplished by moving the head/eye across the field of view and having the reticle static relative to the target image, as opposed to moving either with, or opposite eye positioning. Using the range marks to set the parallax adjustment can prove problematic. RG

 

[Cassidy]

Coyottefur... - to answer your question, from initial installation of the scope the NF scope cap rings have been torqued to 15 in-pounds, and 65-inch pounds for NF side rails. I check them to be sure they are snug before each shoot.

 

[RGRobinett]

An attribute of torque, which we skipped over, relates to the parallelism of the bases & rings: often, the
bottoms of the ring bores are neither on-plane, nor parallel to one another, thus should be lapped, and/or, bedded prior to mounting and torquing the ring screws. Without this process, the scope tube may, upon tightening the ring screws, be substantially BENT!!
Running a lapping bar across the mounted base/bottom rings will provide a good indicator of just how much bending the tube will be subjected to. This (nonparallel bottom rings) may also [negatively] influence click value(s) and tracking. Bedding the rings (both bottom and top) never hurts. Correcting for nonparallel bottom rings is an [often] overlooked positive attribute of the Burris insert type rings: they are very useful. RG

 

[Ggmac]

Why would you want to shoot ( enlarge ) your aimpoint ? Say its a1/8” dot , your first shot goes dead center (22lr) now your aim point is much larger and you must guess where the dot was . You’re asking your eyes / brain to guess where to aim .
Just my opinion

 

[Cassidy]

Ggmac - I shoot varmint for score (one shot on each target for record/score), not for group size, since that's the only BR type of match offered at my range. I would like to be able to use the turrets so the POA and POI are generally exactly the same in no wind at 100 yds so I can hold based only on the wind.