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How bad is this crown?

 
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  #1  
Old 06-07-2009, 02:35 PM
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Location: SW Idaho
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How bad is this crown?

I've been trying to figure out why I can't get my AR-15 to shoot. Basically the best 5 shot group I can muster is around 3". I posted about it here a couple months ago:

AR-15 Accuracy Help

The more I read the more I see that "everyone" with an AR-15 seems to get pretty good accuracy (< 1 moa). I have access to a boresope at work, so I decided to take a closer look at the barrel to see if anything jumped out at me. I didn't find anything inside the barrel that stood out (although I'm no professional), but below is what the crown looks like. Now again I'm no gunsmith, but this crown looks like a rat chewed on it.

I don't know exactly what a "good" crown should look like, but can I assume that this is not it?

Do you think that this could be my source of inaccuracy?




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  #2  
Old 06-07-2009, 02:45 PM
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Re: How bad is this crown?

I'd definitely get something done with that crown before I wasted any more components trying to figure it out.

I'd also buy some rat traps

AJ
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  #3  
Old 06-07-2009, 03:23 PM
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Re: How bad is this crown?

A thats rough looking. You could sent it out or redo it your self with a drill, brass screw and a bit of lapping compound.

I will tell you what it cant hurt it.
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  #4  
Old 06-07-2009, 03:48 PM
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Re: How bad is this crown?

Even if that crown didn't make any difference I couldn't live like that!

Speaking of rats, I think a trained beaver could do better.

As said above, it couldn't hurt to work it a bit.
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  #5  
Old 06-07-2009, 03:53 PM
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Re: How bad is this crown?

I didn't know that you could crown a barrel with a cutting torch.
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ss7mm
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  #6  
Old 06-07-2009, 03:55 PM
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Re: How bad is this crown?

ss7mm

That last coment had me in stiches
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  #7  
Old 06-07-2009, 04:39 PM
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Re: How bad is this crown?

WOW! thats incredible.
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