AR10 Accuracy not good

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Last weekend I went out to the range to make sure my AR was still sighted in correctly.
I fired 2, made an adjustment on the scope and was close to the center.

Took about 4 more shots two were together but high but still in the rings and left from center, two were right of center.

So I'm thinking it is me jerking the trigger.

I got out my 308 bolt gun and put 8 shots right on the bulls eye.

I put both guns on the rest when I shot them, used the same ammo, have identical scopes on both.

So do I have a barrel issue or something else ?

 

[Supersubes]

How’d it shoot on previous outings? What was the actual group size?

 

[simonp]

Large frame gas guns are harder to shoot well than bolt guns, could be as simple an answer as that.

I know that I see a difference in accuracy between my bolt and gas gun in .308

 

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groups were tight, around an inch or less

 

[oldrifleman]

Ok mister Obvious here . Have you check scope mounts and tried to move scope with your hand ?, failing that when was the last time you cleaned it? failing that try another scope on the rifle and see if that changes anything?

 

[[email protected]]

Yup first thing I checked was scope mount to rifle and rings, but it's always good to check the basics first.

I will give it a good cleaning, it has been a while but has not been shot.

And if it still is acting up I will do a scope swap.

Thanks