PSA upper issues

K

kx592

New member
Finally got to shoot my new setup all from PSA. standard lower with a dissipator upper, F marked front sight exc. I had it sent out to ATCO to have a YHM brake installed and pined. Its clean and I shot some black box AE223. I could not get a solid group, period. I came close but it was still around 3" scattered noting close to touching with fliers every 2-3 out of 5, at <100yds. This shouldn't be right. My bushmaster, granted 1/9 barrel, it will get 1" at 65yds all day long with silver bear. Is the 1/7 just to much for 55gr or did she shot warp the barrel or maybe a front sight block moved slightly? Things seem to look OK, IDK what to make of it.

edit: To get it "Close" to zero(dam near impossible), the rear adjustment is very far to the right.
 
How are you shooting the rifle, bench or prone supported? Have you tried other ammo? What is your rear sight set up (removable or carry handle)?
55 gr should shoot fine in 1/7 twist, but it could be that your rifle does not like the AE223. and finally, have someone else shoot it to rule you out of the equation.
 
Didn't shoot before the brake install. And im using irons with carry handle. Going to try to use UMC 55gr this afternoon to see if they fly better. If that does not, what should I be looking at?
 
I'd say consider yourself lucky that your PSA upper actually functions. Mine continuously jams on the left feed ramp due to bad manufacturing.

Multiple calls and emails to PSA without response to the issue. I finally just dropped it off to by buddies at American Spirit Arms to have them resolve it yesterday. I'd rather just pay for their gun smithing than to try and deal with PSA any more. I know the guys at ASA. They actually manufacture all of their own uppers and lowers(unlike most who have their made by bigger companies like Aero Precision). Excellent quality guns too, but not cheap.

PSA has decent prices, but absolutely terribly customer service. I've never been so disappointed with any firearm manufacturer I've dealt with.
 
Make sure you shoot with a stable support. If the carry handle is removable, make sure it is mounted on there securely. Also check where the barrel meets the brake. If it was dinged up during installation of the brake, this can cause the rilfe to be inaccurate. Of course check everything else and make sure nothing is loose.

A picture of the rifle and your targets would give us a better idea of what you are dealing with.
 
Bench rest, using 55gr UMC remington rounds. 60 yards iron sights. Iv gotten 1" groups all day with my light barreled bushmaster, I know its not me. Heres how it goes..3 shot groups.

http://s207.photobucket.com/albums/bb49/kx592/?action=view&current=IMG_20120204_160020.jpg
No adjustment to..
http://s207.photobucket.com/albums/bb49/kx592/?action=view&current=IMG_20120204_160855.jpg
One click to the right on rear..
http://s207.photobucket.com/albums/bb49/kx592/?action=view&current=IMG_20120204_160855.jpg
One click back to left..
http://s207.photobucket.com/albums/bb49/kx592/?action=view&current=IMG_20120204_163700.jpg

This is there disipator model, "extra chrome lining" or something or other. Think its enough to mess up accuracy that badly?
 
You shouldn't be shooting 55gr with a 1-7 for starters, try 62gr or heavier and is it fair to compare what your Bushmaster will do at 65yds with Silver Bear? I love it when people try to compare two different things, but want to call it the same.
 
Also wanted to add that you should have shot it before you had a third party install the brake atleast then you would have a leg to stand on with getting PSA to resolve it, if it does turn out to be something wrong with the rifle. By having a third party work on it you kind of releive PSA of having to honor any warranty. With that said I think that if it does turn out to be something wrong with it PSA should still fix it.
 
i agree, you should always shoot your rifle before getting it worked on.

who is ATCO?? ive never heard of them and it could likely be the problem
 
Try 2-3 different ammo's and get back to us.

I don't think most people realize how crucial ammo is.

CCI mini mags are considered very nice rimfire rounds, which everyone recommends to try if you want to see how well your 22lr shoots. Well I've seen someone's rifle group good with cheaper ammo but when he shot cci mini mags groups opened up ridiculously big.

So unless you have tried 2 to 3 different rounds, youve got nothing to go on.
 
My 1 in 7 PSA shoots some 55gr ammo fine, others group terribly like yours. 62gr and up are all very accurate in it. I'd try a heavier ammo before sending more rounds downrange with it.
 
From your first two groups, I would say its ammo at this point. Two shots together then one away from the group. However, your next two groups are a bit bigger. One click left or right only adjust the POI about 1/4 at 50 yards so the big shift is not explained there. Can you explain your set-up and routine for shooting?

BTW 1 in 7 twist can shoot 55 gr and heavier bullets. I forget who posted what each twist can stabilize and shoot but it's here somewhere.

http://thefiringline.com/forums/showthread.php?t=477488&highlight=twist
 
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Also wanted to add that you should have shot it before you had a third party install the brake atleast then you would have a leg to stand on with getting PSA to resolve it, if it does turn out to be something wrong with the rifle. By having a third party work on it you kind of releive PSA of having to honor any warranty. With that said I think that if it does turn out to be something wrong with it PSA should still fix it.
Click to expand...

+1

Probably a ammo issue but I would check for any strikes on the ADCO installed YHM brake. ADCO is known for quality work but stuff happens. To bad the brake is pinned, you could remove it and see if that makes a difference.
 
Im going to try some 855 62gr., hopefully tomorrow to see if it makes a difference. What "strikes" and where?
 
What he means is take a look in the flash hider/compensator. Also, check the crown. If there's any unusual marks/scratches/chips/ect... the bullet may be striking it upon exiting the rifle.
 
Yea when I see stuff like that the first thing I do is look for the location of the OP, but didn't see it on you. Gotta love stupid laws!!
 
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