Rem 700 6.5 CM Hitting to the right

[Black Tail Hunter]

A colleague has a new Remington 700 in 6.5 CM. He has a picatinny rail with Vortex rings and a Vortex Diamondback scope. He has worked up hand loads and had the gun grouping well and zeroed at 100 yds. He backed up to 500 and still the gun was grouping well but was impacting about 5" to the right of center.

He removed the scope, rings and rail to check if everything was tight and seemingly aligned correctly. He reinstalled the rail and rings, lapped the rings and reinstalled the scope. Took it back out, re-zeroed it at 100, moved back to 500 with the exact same result.

I have never encountered this type of problem and really didn't have a direction to suggest, has anyone experienced this and if so what are the common things a person should be looking for?

 

[26Reload]

Are the receiver screw holes aligned correctly....
Front could be off to left....
Rear could be off to right...
Both could be off to left....

 

[Ken61]

I am no help. Seems like the wind or mirage is a problem.

 

[Reelamin]

Is the scope level to bore? And if so does he have a level on scope and use it?

 

[ShtrRdy]

Is he shooting from the same position at 100 and 500? Bench/prone/front rest/bipod/sandbag?

 

[Carlos88]

Your crosshairs are crooked.

 

[tankgijohn72]

Your scope is not level. As you dial up or hold over your inducing an angle in your shooting. If you dial scope back down to 100 yard setting and shoot at the 500 yard target you should hit center of target but low. If that checks out good dial up again and if still hitting 5" right then definately scope level issue, or internal tracking issue.

All of this is assuming there is no crosswind you didnt account for.

 

[xsn10s]

I thought creedmoors would be left leaning Sorry I couldn't help it. I vote that the scope is canted to the right. Or the scope is tracking is off. Mark the scope with a sharp pencil. I mark the scope right where the rings split and mark off the lower ring. And loosen the rings and turn the scope slightly to the left. Tighten and try it out at the next range day. Rinse and repeat if needed.

 

[Black Tail Hunter]

I am no help. Seems like the wind or mirage is a problem.

no wind or mirage present when he was sighting in.

 

[Black Tail Hunter]

Are the receiver screw holes aligned correctly....
Front could be off to left....
Rear could be off to right...
Both could be off to left....

This was one of his concerns, however neither of us knows how to determine if the holes were out of alignment with the centerline of the action. How do you do this?

 

[Black Tail Hunter]

Is the scope level to bore? And if so does he have a level on scope and use it?

He said he leveled the action, then the scope using the string method. i do not believe he has a scope level but not 100% sure

 

[Black Tail Hunter]

Your scope is not level. As you dial up or hold over your inducing an angle in your shooting. If you dial scope back down to 100 yard setting and shoot at the 500 yard target you should hit center of target but low. If that checks out good dial up again and if still hitting 5" right then definately scope level issue, or internal tracking issue.

All of this is assuming there is no crosswind you didnt account for.

This would be a good test, i will suggest it.

 

[Black Tail Hunter]

I thought creedmoors would be left leaning Sorry I couldn't help it. I vote that the scope is canted to the right. Or the scope is tracking is off. Mark the scope with a sharp pencil. I mark the scope right where the rings split and mark off the lower ring. And loosen the rings and turn the scope slightly to the left. Tighten and try it out at the next range day. Rinse and repeat if needed.

This is totally fine, its not my rifle HAHA. I was going to utilize the "man bun" suffix but held off since i was actually trying to help resolve a problem haha.

 

[jimbires]

2 good articles on this . hope this helps .

Reticle Perpendicularity

Reticle Perpendicularity By Darrell Holland Long range shooters go through great pains to properly set-up their rifles for long range shooting. Bipods, muzzle brakes, cosine indicators and a host of other widgets often adorn their newly created...

www.longrangehunting.com

How Canting Your Rifle Affects Long Range Accuracy

How Canting Your Rifle Affects Long Range Accuracy By Carl Taylor The simple textbook answer is that due to the canting of the weapon, the round will impact low and to the side that the weapon is canting. The more the cant and distance the...

www.longrangehunting.com