Quick Answer
A rifle shooting left after tuning adjustments can be due to inconsistent bullet release, incorrect sight alignment, or a barrel issue, such as a bent or twisted barrel.
Barrel Alignment
When a rifle shoots left, it’s essential to inspect the barrel for any signs of misalignment or damage. Check the barrel for any visible signs of bending or warping, and use a borescope to inspect the interior of the barrel for any abnormalities. A barrel that is bent or twisted can cause the bullet to veer off course.
Sight Alignment
Even with a perfectly aligned barrel, a rifle can still shoot left if the sights are not properly aligned. To check sight alignment, use a bore sighter to align the sights with the barrel, and then fire a few shots to verify that the rifle is shooting true. If the rifle is still shooting left, check the sight screws to ensure they are tightened evenly and not over-tightened, which can cause the sight to shift.
Bullet Release
Inconsistent bullet release can also cause a rifle to shoot left. To check the bullet release, try using a different type of ammunition or a bullet with a different weight or profile. You can also try adjusting the trigger pull weight or the sear engagement to see if that improves the bullet release. If the rifle is a semi-automatic, check the magazine and feeding system to ensure that the bullets are being fed consistently.
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