Hey guys. I was sighting in a 30-06 tonight and am stumped. I was shooting from a bench and it was very accurate at 100 yards. Groups were tight and excellent- dead on. I backed up to 200, groups were still tight but it was consistently 15 inches off to the right. I figured I had somehow bumped it, so I made sure everything was tight and moved back to 100 yards, yet it was still dead on at 100. Any ideas what may be causing this? Thank you.

Different rest or same?

The ammo.

My guess for it to be off that much from 100 yds to 200 yds something is lose or the scope is broke. I mean that's a 7 1/2 moa shift! I'm not and expert and maybe there's something else that could cause it but I'm thinking something is malfunctioning. Be intresting to see if that 7 1/2 moa shift carried out to 300 yds

Never seen that before

U think a different rest can cause a 7 1/2 moa shift? I've shot off about everything u can think of in about every position possible and never seen anything close to that.

What is the ammo you are using?

Are you making higher power magnification for 200 yds ? If yes could be your scope problem not knowing anymore details

Sounds like a scope issue when you increase the magnification for the longer yardage at first guess and with the information provided

Has this rifle been sighted in before with a different scope? If it has it may well be a issue with your scope or mounts. If this is the first time the rifle has been scoped it is possible that the scope mount holes are not drilled parallel to the action/bore this will allow you to sight in at 1 range but it is off at any other distance. A barrel not square with the action will do the same thing. The way to test for this is to sight it in at 100 yards then shoot it at 50 yards and then at 200 yards. So, if your groups are 7 1/2 MOA to the right at 200 yards, they will be about 7 1/2 MOA (3 3/4 inches) to the left at 50 yards. This is not a common problem but it does occur.

The other possibility is that you have a bad scope or the mounts/rings are not square. Is the scope a known performer or a new scope? What type of mounts are you using? Parallax can also cause impact shift but I would be surprised if it is that much of an error. Test your scope at 100 by zeroing at what ever power and then shoot a group at the lowest power and the highest power and see if there is a shift.

Maybe the shooter is just more comfortable in one rest like a lead sled and jerking er to the right when they move back without it. I'm spitballing because shifting 15" off at 100 yard difference is dramatic. I have not saw a scope hold a group at 100 but have a consistent 15" shift 100 yards further out.

are you perfect at 25 , 50 , 75 and 100 or are you only sighting in at 100

my guess would be your scope is not on strait so you can sight in at 100 and be perfect.
but because the scope isn't parallel to the barrel it is off again at 200 you could probably make it right at 200 and then have it be 7 1/2 inches off at 100

this is why shooting at 25 , 100 , 200 is a good validation you should not have any difference with windage

Thank you for the replies. I was using the same rest. Ammo was Federal 150 grain soft point. Nothing changed with magnification from 100-200 yards. This was a new Bushnell scope with factory rings. I bought this rifle with a much older scope already mounted to it. It was accurate at 200 but was very blurry, so I replaced it with the Bushnell.

I never was a fan of Bushnell scopes but the mounting could be as culpable as the scope.

If it was good before and the only thing that changed was the scope and now you are having issues I would put a different scope on it. If your buying ammo it gets expensive doing a lot of shooting and why I don't mind spending money on quality optics that are repeatable and consent.

Had issues with one of my sons rifles vertical stringing 8" up and down at 100. I pulled my best scope off my semi custom long rang gun and put it on that gun to rule out if it was the new scope or the new gun
Turned out it was the gun liked 170gr ammo not the 150gr that the other identical gun my other son had been shooting.
Swapping the scope for a know performer Removed the guessing if it was an optic issue and saved some money bon ammo and frustration trying to figure it out.

Your scope is messed up internally or not mounted straight. You can adjust the point of aim to intersect with point of impact at one point only if that's the case. See what it does at 50 yards to confirm. It should be off the other direction, I'm guessing by 1/4 as much distance as it is at 200 the other way.

Bushnell has some incredible scopes. They were made by LOW in Japan and are their Elite series. Not sure what model you have. Sounds like an alignment issue.

How hot is the barrel between shots , I'd also check to see if the barrel has any spots where the stock may be pinching the barrel ? Years ago I had a brand new .7mm Remington mag that was shooting all over the place as it got hot , cold bore shots were where they should of been . Just quite thought .

A. Scope

B. Rings are not aligned to the barrel

C ammo is not stable

I didn't have much time last night to finish this. Working up loads for various rifles we run into this every once in a while. The "group" is outstanding, but it is actually corkscrewing as it goes down range. Easy test for this is leave the crosshairs as is and shoot 50 yrd increments 50, 100,150,200,250, 300. If you begin to see a circle develop around your target, its ammo. If it continues to grow a relatively straight line out away, your rings are misaligned to the barrel.

Scope mounts, maybe scope.