Dead on at 100yds 4inches right at 400yds

buzzyb

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Joined
Oct 24, 2017
Messages
136
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.
 

243winxb

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Joined
Sep 9, 2016
Messages
464
Location
USA
The right hand twist of the barrel will move bullets to the right a little.

Off axis may be another cause. The scope needs to be centered over the bore.

The internal adjustment of the scope should be centered before mounting. Use a adjustable windage mount to zero the rifle.

What i do- Sight in at 200 yds with bullet impact 1" left of center aiming point. At longer range of 400, should be close to center.
 

Barrelnut

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Joined
Dec 16, 2013
Messages
4,379
Location
End of the Oregon Trail
Off axis may be another cause. The scope needs to be centered over the bore.
^^^^ THIS ^^^^

The bore need to be straight under the scope bell, before you adjust the scopes reticle to be vertical with a plum bob. If not, if zeroed at 100 yards the bullet will appear to drift left ot right from the 100 yard zero.
See the top part of the pic below.

scope alignment.jpg
 

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