Sighting in riddle

Tennessee Deer Sporting & Deer Hunting Community Forum

Help Support TNDeer | Tennessee Deer:

fairchaser

fairchaser

Well-Known Member
Joined
Sep 13, 2011
Messages
9,789
City & State/Province
TN, USA
Sighting in a new Tika .308 with Remington 150 g corelokt ammo. No problem zeroing MOA at 100 yds. Move out to 300 yds, adjust for bullet drop and can't hit paper. Come back to 200 yds and hit 6 inches right still MOA. Adjust scope to zero at 200 yds then come back to 100 and now it shoots a couple inches left but still MOA. What's up?

I thought spin drift but it's not far enough for that. The wind was not an issue. If anything it was blowing left to right so it would have moved the poi right not left. Any other suggestions would be helpful.
 
Are you sure the scope isn't canted? If it's not level with the barrel your groups shift left or right when you start getting some distance on them.
 
TraumaSlave":ar97bw2z said:
Try different ammo. Corelocks never shot worth a hoot past 150 yards in any of my rifles.
Click to expand...

We are definitely going to try some match grade ammo.
 
Hardwoodmaterials":1y4yhlgf said:
Are you sure the scope isn't canted? If it's not level with the barrel your groups shift left or right when you start getting some distance on them.
Click to expand...

This was my first thought too or that the scope was mounted misaligned with the barrel. But the windage reticle is very near the center of its range and it's a picatinny base so there is no course adjustment like a traditional base. The cross hairs are dead level too.
 
Scope could be defective. Switch it out with another and try sighting it in again. Don't forget, a 1/4 inch click at 100 yards is not 1/4 at 200 or 300
 
165 grain Federal Fusions shoot great in my Remmy .308. Cloverleaf groups at 100, set 2" high from center, dead nuts at 200 and 300.
 
Gonna start from scratch and check the scope mounts as well as try a different scope. All I know to do is start the process of elimination with the simplest fix first. Change ammo, then the scope and finally send the gun back if necessary. Possibly the barrel is crowned improperly.

Thanks for all your collective input. There's a solution there somewhere.
 
fairchaser":1rzswyiu said:
Gonna start from scratch and check the scope mounts as well as try a different scope. All I know to do is start the process of elimination with the simplest fix first. Change ammo, then the scope and finally send the gun back if necessary. Possibly the barrel is crowned improperly.

Thanks for all your collective input. There's a solution there somewhere.
Click to expand...

If the rifle is shooting MOA but the point of impact is shifting my bets are it isn't crown related. Bad crowns usually play havoc with accuracy and bullets are sprayed all over the place.
 
sounds like the scope is canted,,or the reticle isnt level with the knobs in the scope or you are canting the rifle when shooting,,,

when I started shooting prone my groups walked right as the range increased,,I would have the scopes mounted level with a level and then attach a bubble level to the scope and start from there,,

my scopes looked level to me but were not and it took me about 3 months to break myself from canting the rifle when shooting with the level,,after much practice I dont need the level anymore,,


but it could very well be the scope is tracking sideways as you crank it up,,
 
With Consitent MOA groups the ammo or gun is not the problem. As stated above your crosshairs aren't level either scope mounted off or you are canting. If the scope is not mounted perfectly level it shouldn't make much difference provided you're not dialing in distances.
 
I'll tell on myself for a scope mounting mishap because it sounds like this could be the same situation. Not that long ago (can't blame it on being a beginner) I put a new scope on something. I don't even remember which rifle it was. But I mounted the new scope and started shooting at 25 yards to get it on paper. Got on paper right away and once I fired a couple of shots that printed close enough together I started making adjustments. I couldn't get anything to do what I wanted. I was about to declare the scope defective. Then I looked at the rifle and it jumped out at me. After mounting no telling how many scopes, I had rotated this scope so that the Windage knob was on Top and the Elevation know was on the Left side. Of course it would probably be possible to leave it that way if you now used the Windage to change Elevation and vice versa but using the knobs as labeled sure won't work when you turn a scope 90 degrees like that. :shock: :lol:

Must be old age is the only excuse I can think of.
 
Hunter 257W":36dqlmrr said:
I'll tell on myself for a scope mounting mishap because it sounds like this could be the same situation. Not that long ago (can't blame it on being a beginner) I put a new scope on something. I don't even remember which rifle it was. But I mounted the new scope and started shooting at 25 yards to get it on paper. Got on paper right away and once I fired a couple of shots that printed close enough together I started making adjustments. I couldn't get anything to do what I wanted. I was about to declare the scope defective. Then I looked at the rifle and it jumped out at me. After mounting no telling how many scopes, I had rotated this scope so that the Windage knob was on Top and the Elevation know was on the Left side. Of course it would probably be possible to leave it that way if you now used the Windage to change Elevation and vice versa but using the knobs as labeled sure won't work when you turn a scope 90 degrees like that. :shock: :lol:

Must be old age is the only excuse I can think of.
Click to expand...


I was thinking this very thing. Because early in my shooting life I did the very same thing.
 

Latest posts

Back
Top