Back at the range :sad:

[Pushbutton2]

Verifying zero.
One minute I'm good, next low and left.
Than low and right.
Shot feels good it's off, feels bad it's close.
I miss my 5.56.

This batch is Hornady Superformance 165 grain GMX.
Ridge was sighted in using Hornady Full Boar 165 grain GMX

I picked up my brass.
Not sure what this mark means
Unfired on the left.
Fired on the right.
Half moon mark is what's puzzling me.
Last week it was stove piping. But the primer was facing out and the next round was in the chamber.


Unfired Round


12 fired rounds. All have that mark.


Google says it's an Ejector swipe.
Is that something to be concerned over?

[WTucker]

Ejector marks from high pressure.

[Pushbutton2]

Ejector marks from high pressure.

High pressure

I'm shooting factory loaded Hornady Superformance.

Do I need to be scared to shoot this ammo?

[CWendling]

cratered primers like that can also be a high pressure sign

[WTucker]

High pressure

I'm shooting factory loaded Hornady Superformance.

Do I need to be scared to shoot this ammo?

I wouldnt shoot it anymore. Have you tried other kinds of ammo, and how did it do?

[Artos]

Is it doing that with other factory ammo??

Right now I would be concerned with a tight chamber...I don't recall, what's the story on the rig??

[Pushbutton2]

I wouldnt shoot it anymore. Have you tried other kinds of ammo, and how did it do?

I've sir 2 Manufacturers Ammo

1) Hornady Full Boar 165 GMX @ 60 rds
Gave a buddy some spent casings. He said 1 of the 4 he saw laughing on his reloading bench had it.

2) Browning 168 grn Controlled Expansion. 20 rounds.
Didn't check

3) Hornady Superformance 165 GMX
12 rounds. Noticed it with these rounds.

Is it doing that with other factory ammo??

Right now I would be concerned with a tight chamber...I don't recall, what's the story on the rig??

History:
DPMS Oracle AR10 about 92 rds
Factory gas and BCG
Only swap I didn't was Trigger and Pistol grip.

[Artos]

If it were me, I would contact DPMS & have them check the gun out since you are seeing it with multiple boxes...personally, I would not be comfortable selling it with such excessive pressure signs. I would send the fired cases in as well.

I don't think you have a Hornady problem.

[WTucker]

If it were me, I would contact DPMS & have them check the gun out since you are seeing it with multiple boxes...personally, I would not be comfortable selling it with such excessive pressure signs. I would send the fired cases in as well.

I don't think you have a Hornady problem.

I have to agree with Artos. Those are some pretty severe marks on the brass, and if it is happening with multiple types of ammo get it checked out.

[captainsling]

Hornady Superformance is CRAP. Change to Hornady Match and I bet you have no issues at all.

[stxhunter]

Over pressured for sure.

I’d contact DPMS, may be a chamber/headspace issue.


Sent from my iPhone using Tapatalk

[critter69]

Do you or any one you know have another 308 you could fire one of those rounds in a different gun? May tell you if it's the gun or ammo. In consistent on target because you are grossly over pressure.

[Pushbutton2]

Thank you all.

I spoke with the owner of the gun shop where I bought it.
He thinks it could be a bolt issue.
He said I should contact his Gunsmith. I'm ok with that.

I'm trying to track down as much of the brass that I've shot though it as I can.

I have a buddy that has a Delton Echo .308.
I'll ask him to fire a few rounds through his rifle for comparison.
I only have 8 rounds of the Superformance left.

Another thing I was thinking is that the 1st 15-17 our so rounds I seemed to be pretty accurate and than it went to put.

I cleaned the rifle very good after shooting it last week. The patches were coming out clean.
I did have a pile of green ones.
That didn't seem to help my range session today.

Here's a link to another thread I started about this rifle.

https://r.tapatalk.com/shareLink?url=http%3A%2F%2Fdiscussions%2Etexasbowhunter%2Ecom%2Fforums%2Fshowthread%2Ephp%3Ft%3D690700&share_tid=690700&share_fid=1255&share_type=t

https://r.tapatalk.com/shareLink?url=http%3A%2F%2Fdiscussions%2Etexasbowhunter%2Ecom%2Fforums%2Fshowthread%2Ephp%3Ft%3D690962&share_tid=690962&share_fid=1255&share_type=t

[miket]

Hornady Superformance is CRAP. Change to Hornady Match and I bet you have no issues at all.

Yep. My favorite round for my Howa 270 was the Hornady Custom with the 130gr SST. Shot so well I never even tried anything else. Then they quit making it and replaced it with the Superformance SST load. Total crap. Like 2-3" groups. I searched and searched for old stock custom rounds but couldnt find any. Ticks me off.

[xman59]

High pressure

I'm shooting factory loaded Hornady Superformance.

Do I need to be scared to shoot this ammo?

from that gun yes,,,