Update with Pics...What would cause an AR to shoot

Re: What would cause an AR to shoot

aliens , sunspots, and crop circles have a tendency to make many twitch.....prolly operator error.


i forgot a BLuE moon....if you shot it in December ...it was a month with a BlUe moon
 
Re: What would cause an AR to shoot

Gas block? not sure what what you mean "(pin'd pony{hint}one"

Some gas leakage is "normal"

Was it a good shooter? the upper and you or friends(have to ask)?

Factory upper or home build?

Round count?

Crown show a even carbon pattern?

Really get a good grip on the upper and barrel, twist opposing side to side to see if there is any movement.
 
Re: What would cause an AR to shoot

Just looked at that again, ten shot group. Still does it shoot side to side or start at one side and move to the other?
 
Re: What would cause an AR to shoot

You might want to check the crown for any defects.
It does not take very much of a ding in the crown to affect accurracy.
Do you have a mil spec extractor spring in your rifle?
 
Re: What would cause an AR to shoot

Are you shooting off a bipod? Would also check the bolt carrier key to make sure it's not loose and/or binding with the gas tube. Somebody earlier said something about barrel could be loose and I would check this more closely with my AR tools, even if it didn't feel loose by hand. I knew a guy who had a similiar problem and it was the barrel. He removed the barrel and reinstalled it, this time with a little threadlocker (purple?) on the barrel ext and just inside the AR upper where the ext seats and problem solved. Good luck and hope you find your problem...
 
Re: What would cause an AR to shoot

Have you always ran 69Gr SMK's? If it's been an issue since new it could be the load. My 1:9 hates 69SMK's. Bumped up to 73gr Bergers and all is well.Also,isn't horizontal stringing indicative of improper trigger control? Just throwing out another option.
 
Re: What would cause an AR to shoot

"What would cause an AR to shoot"

I was thinking make it into an AK, but then I read the problem.
smile.gif
 
Re: What would cause an AR to shoot

I had a similar if not worse problem with a BM varminter; frustrated the shit out of me. I never did figure out what the problem was before I sold it. My dealer said it could have just been a crappy barrel.

You said your scopes were fine, but did you also check your base and rings?<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 308sako</div><div class="ubbcode-body">
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One of today's targets... And Thank You</div></div>

I had a similar if not worse problem with a BM varminter; frustrated the shit out of me. I never did figure out what the problem was before I sold it. My dealer said it could have just been a crappy barrel.

You said your scopes were fine, but did you also check your base and rings?
 
Re: What would cause an AR to shoot

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stiggy</div><div class="ubbcode-body">Have you always ran 69Gr SMK's? If it's been an issue since new it could be the load. My 1:9 hates 69SMK's. Bumped up to 73gr Bergers and all is well.Also,isn't horizontal stringing indicative of improper trigger control? Just throwing out another option. </div></div>I was going to say something close to this but the other way. 1:9 should like "lighter" bullets... Not heavier. Heavier bullets usually don't stabilize in a 1:9 very well. This isn't "etched in stone"... I've seen exceptions. Just a thought.
 
Re: What would cause an AR to shoot

I think your barrel nut is loose -- not loose as in, ready to fall off, but loose, as in, it ain't tight enough. I've seen similar groups from other rifles with loose barrel nuts. Remove the gas tube and tighten the barrel nut, reinstall gas tube; problem vanishes.
 
Re: What would cause an AR to shoot

Things to consider:

1. Scope parallax set at improper distance (or shot at a distance that the scope is not set for with parallax), and inconsistant positioning of the head.

2. Shooting a load that is not at the right muzzle velocity for your rifle (the bullet is exiting the barrel while the barrel harmonics are causing a side-to-side motion).

3. improper/inconsistant trigger pull and follow-through.

4. holding and/or supporting the rifle inconsistantly from shot to shot. When you fire a group, do you do it all in one sitting while maintaining the same set-up and hold on the rifle, or are you letting go of the rifle in between shots?