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Posted:  3/20/2009 5:34 PM #10391
rjr573


Joined: 3/20/2009
Posts: 6
Last Post: 3/23/2009
Subject: AR-15 accuracy issues,,,all ideas welcome
Howdy Fellas.

I'm new here and wonder if anyone knows who makes Delton barrels ?

I've read lots of good reviews on them but the 20" HBAR 1-9 twist chrome lined one I have seems to have a mind of it's own. At 100 yds I cant seem to get groups any better than 8"-10" spread. I am using a bench rest and tried a few different brands of bullets. Even had my buddy try it with the same results. Tried a couple different scopes too.

At 50 yds its still spreading them around. I'll get a flier, then maybe the next 3 shots will be a few inch spread than another flier.

Everything is new, I just assembled this rifle and have put a couple hundred rounds thru it so far.

My 10/22 am SKS shoot better at 50 and 100 yds. than this AR-15 which just aint right.

Your thoughts are welcome

Thanks.

Randy.

Posted:  3/20/2009 9:16 PM #10389
Jeffrey


Joined: 7/19/2007
Posts: 488
Last Post: 12/18/2009
Did you use all new parts? Not a used bolt I hope. How much torque did you use on the barrel nut? Loosen and retorque it. Check your gas tube to make sure your bolt is not slamming into it. Remove your flash hider and make sure there are no dings on it. Remove your scope and use iron sights to eliminate the scope or rings variable. What bullet weights are you using?
When was the last time you went to the range?

Posted:  3/21/2009 9:47 AM #10395
rjr573


Joined: 3/20/2009
Posts: 6
Last Post: 3/23/2009
Subject: AR-15 accuracy issues
Hi Jeff.

Thanks for your feedback.

Yes all parts were purchased new.

The upper receiver and barrel came assembled as a unit.

Gas tube is not being hit by the bolt carrier.

Flash hider is not being touched by bullets.

No iron sights on this rifle.

Tried 55 grain Wolf black box and 55 grain Winchester white box. Winchester was much better than Wolf.

Randy.

Posted:  3/23/2009 12:02 AM #10405
Jeffrey


Joined: 7/19/2007
Posts: 488
Last Post: 12/18/2009
Try some 62 grain bullets. Wolf is junk.
When was the last time you went to the range?

Posted:  3/23/2009 9:48 AM #10407
BikerBen4


Joined: 3/26/2008
Posts: 4268
Last Post: 9/11/2012
Subject: AR-15 accuracy issues,,,all ideas welcome
rjr573-Thanks for your feedback.
Yes all parts were purchased new.
The upper receiver and barrel came assembled as a unit.
Gas tube is not being hit by the bolt carrier.
Flash hider is not being touched by bullets.
No iron sights on this rifle.
Tried 55 grain Wolf black box and 55 grain Winchester white box. Winchester was much better than Wolf.
Randy.

I suggest trying some different weights for your bullets. When everything else on your rifle is working just fine, check your ammo. I have a 20" bull barrel (1-8" twist) that likes 55gr soft points just fine, but I can see a HUGE improvement when I move up to the 69-75gr range. Get a box or two of 45 or 50 grain and maybe some 62gr, and try again. I bet you'll start seeing some kind of grouping. Keep in mind that 1-9" twist barrels make it somewhat difficult to find the right load for your particular rifle/carbine. A 1-8 and 1-7 seem to like a pretty wide range of weights, but generally prefer the heavier ones, whereas the 1-9 barrels can sometimes only like 40-50gr bullets - 55gr being too heavy.

Also, seriously, check your scope mounts. I thought I had mine on correctly one day...I was wrong. As soon as I tightened everything up properly, it started shooting through one ragged hole. Just something to think about.

Keep us posted...
Moderator of CheaperThanDirt.com/Forums

Posted:  3/23/2009 12:24 PM #10400
MartiMcFly


Joined: 6/3/2008
Posts: 589
Last Post: 10/27/2010
What kind of glass do you have on the rifle?
Martin
MartinD@CheaperThanDirt.com
www.CheaperThanDirt.com

Posted:  3/23/2009 7:11 PM #10401
rjr573


Joined: 3/20/2009
Posts: 6
Last Post: 3/23/2009
Subject: Scopes
I've tried a few scopes none of which are high dollar, actually they are cheap. But I've used these same scopes on my other rifles with no problems.

3-9x42 Simmons
3-9x42 Tasco
6.5-20x50 Barska
8-32x40 BSA

All these scopes produced similar results and again they work better on other various rifles.

Thanks again for all your input. I'm suspecting it's an ammo issue too. I'll have to locate some lighter grain stuff to test.

Fuuny though I have a 16" bbl. carbine that shoots better than this 20" HBAR with the same scopes.

Posted:  3/23/2009 11:58 PM #10403
Jeffrey


Joined: 7/19/2007
Posts: 488
Last Post: 12/18/2009
It is possible that the chroming was not done very well and messed up the tolerances of the rifling. Perhaps some of the plating is thicker in some places than others. Consider this: If the chrome plating at the first half of the barrel was .0002 thicker than the downstream half. When the bullet encounters this narower passage first, the bullet will be "resized" and now loose in the second half of the barrel. This is only one possibility of course. I would retorque the barrel and try again with different bullets. If no change then definately call del-ton. Heck, call them now.
When was the last time you went to the range?

Posted:  3/31/2009 1:49 PM #15012
Speed Biker


Joined: 3/31/2009
Posts: 94
Last Post: 1/24/2013
If the optics aren't the problem, have a good gunsmith check the crown of the barrel for burrs or irregularities. If the crown isn't perfect, it won't shoot worth a damn. Also, you didn't mention the chamber, 5.56 Nato or .223 Remington?


Posted:  12/5/2009 5:19 PM #20478
steveono31


Joined: 4/12/2008
Posts: 17
Last Post: 12/5/2009
I have spoke with Delton about their barrels and they tell me that Wilson makes them. If it were a 1/8 twist I have a handload that has won the last 8 out of 10 500yd competitions. I know that I only use Wilson, LMT, and Sabre. I have also had good results with Lothar Walther. When you are having a spread that big at 100 yds something is either wrong with the way you installed your barrel or your optics. Believe it or not an AR15 is rougher on optics than a 30 06 and other higher powered bolt guns, simply because of the gas blowback operation, and can move optics very easily, that is why I use Badger Ord. or Burris Extreme w/ the 3 torx heads on each side. I have built over 1000 AR's and have never had a gun that didn't shoot under a 1" group with my handloads. I have played with every option available for the .223 in the AR platform for handloading, and have found out that the 1/8 twist like the 50gr V max bullet even better than the heavier bullets. I have a RRA Varmint A4 with scout rail, Timney trigger, and 20" Wilson factory heavy barrel, and with factory rds, the best ever was .8 and sometimes a little better, but with my handloads it shoots super consistently in the 3's @ 100. Any questions just shoot me an email. Thanks FOX GUN WORKS
CLASS III AND LOVIN IT

Posted:  5/11/2013 1:42 PM #37707
Jack Lalley


Joined: 5/11/2013
Posts: 1
Last Post: 5/11/2013
Have you called the folks you bought the barreled upper from?   It might be a bad barrel and they may well exchange it or fix it if you return it for the cost of postage.   I had an upper I bought that refused to fire semi-automatic.   I called up the vendor and had it promptly replaced and have never had a problem since.   It shoots well under an inch too.   Give 'em a chance..... for it!


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