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Rifles, Reloading, Optics, Equipment
Gunsmithing
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<blockquote data-quote="tobnpr" data-source="post: 2785414" data-attributes="member: 68758"><p>As said, obvious stuff first.</p><p>Rings, mount, scope- all tight. You didn't say whether the optic is new, or off another rifle. If it's new, swap it out to rule out it being defective. Make sure your action screws are tight as well- nothing should move.</p><p></p><p>I've had a few customers let me know of heavy fouling from solids during "break-in". I'd do as suggested and make sure the bore is stripped clean before the next testing. I'm assuming you don't have a bore scope- and if you don't know what you're looking at anyway they can cause unnecessary worry. That said, if you have a local smith I'd call him to stop by for a quick scoping of the chamber and throat. If the chamber wasn't cut concentric with the bore (he can tell easily be looking at the start of the throat) it will cause this type of inaccuracy. When the bullet isn't launched perfectly straight into the rifling, bad things happen...</p><p></p><p>If all that's negative- go back to your reloading. I'll second that every rifle likes something different- both bullets, as well as powder types. I just re-read your post- if you're just above MOA and not shotgun patterns- it's probably <strong>not </strong>a scope problem or something loose. That usually means you need to do more load development. I have an AR-10 that wouldn't group 168's inside 1-1/2"- but shoots 175's under 1/2" all day long. Go figure...it's all about harmonics.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 2785414, member: 68758"] As said, obvious stuff first. Rings, mount, scope- all tight. You didn't say whether the optic is new, or off another rifle. If it's new, swap it out to rule out it being defective. Make sure your action screws are tight as well- nothing should move. I've had a few customers let me know of heavy fouling from solids during "break-in". I'd do as suggested and make sure the bore is stripped clean before the next testing. I'm assuming you don't have a bore scope- and if you don't know what you're looking at anyway they can cause unnecessary worry. That said, if you have a local smith I'd call him to stop by for a quick scoping of the chamber and throat. If the chamber wasn't cut concentric with the bore (he can tell easily be looking at the start of the throat) it will cause this type of inaccuracy. When the bullet isn't launched perfectly straight into the rifling, bad things happen... If all that's negative- go back to your reloading. I'll second that every rifle likes something different- both bullets, as well as powder types. I just re-read your post- if you're just above MOA and not shotgun patterns- it's probably [B]not [/B]a scope problem or something loose. That usually means you need to do more load development. I have an AR-10 that wouldn't group 168's inside 1-1/2"- but shoots 175's under 1/2" all day long. Go figure...it's all about harmonics. [/QUOTE]
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