Dead on at 100yds 4inches right at 400yds

[RYEWSKY25284]

Shot this group yesterday 1st pic. Shot same load today after zeroing at 100yds 2nd pic

are you calling this load "dead On"? @100yds

 

[RYEWSKY25284]

Got my gun shooting dead on at 100yds went to 400yds it shoots 4 inches to the right. My scope is level [checked it twice] what could be causing this.

also what (tomsd) said

 

[richhymas]

No I don't . How much will wind effect the poi at 400yds

I shoot the same bullet and similar velocity. For me the magic wind is 0.1 MOA for every 3 MPH wind per 100 yards, so a 3 MPH wind at 400 yards is 0.4 MOA. This rule holds quite well out to 700 yards and is super handy in the field.

 

[richhymas]

Also, try shooting it opposite handed from a bench. That would likely help tease out any movement caused by recoil or position or technique.

 

[tomsd]

Suspect downrange wind.

 

[RYEWSKY25284]

the center line of your scope isn't parallel or inline with the center line of your bore.
As the bullet flies away from you, it continues at the centerline angle of your optic moving away from the centerline of the bore.

 

[Backcountry sports]

Got my gun shooting dead on at 100yds went to 400yds it shoots 4 inches to the right. My scope is level [checked it twice] what could be causing this.

Wind and clean remove copper inside barrel

 

[buzzyb]

barrel has about 30 rounds on it since cleaned

 

[Stevenstl86]

Something must of come loose. There is no way it would shift that much at 400. Do you have some hand loads that shifted you can pull down to verify powder charge. Just a though

 

[BigJohnH]

How are you

Got my gun shooting dead on at 100yds went to 400yds it shoots 4 inches to the right. My scope is level [checked it twice] what could be causing this.

How are you holding the weapon?

 

[TheLongRanger83702]

Got my gun shooting dead on at 100yds went to 400yds it shoots 4 inches to the right. My scope is level [checked it twice] what could be causing this.

Your reticle isn't plumb with your scope's body. If your using your scope caps surface to rest your level on and it isnt square with the scopes internals it will be off when you go out shooting at longer distsnces using your elevation adjustment. Sounds like the scopes internals are tilting slightly in the clockwise direction. Square your reticle to your bore using a plumbline instead of a bubble level.

 

[sevans1965]

Always hard to diagnose problems from behind a keyboard, especially when is sounds like the basics are covered. I am a fan of shooting video of myself shooting, especially looking at the trigger finger, shooting position, are you lifting your head after the shot, etc, etc.
Most of us don't shoot enough to develop good muscle memory, so insuring one is practicing good fundamentals should be evaluated often.

 

[Jeremy338]

I used to own a 338 lapua that did the same thing. 4" at 400. It would compound to 10" at 1k. I shot the gun so much I chalked it up to spin drift.

 

[INVICTUS]

The gun or you is shooting right at 100. It's shooting more right at 400 because of the distance. Several ways to fix it . Just pick one and work at it.