They can bulge. Some guys hunt with them for years not even knowing it. Can be very slight. This one’s more obvious….

I’ve had case head separation after an OBF. Was extremely loud and powder everywhere, enough to kinda sandblast my hand/arm and draw pin pricks of blood. PPE…
So it separated right where it head spaces up at the shoulder. How does Barnes source their brass? The wrong powder seems unlikely but certainly not impossible. At the very least you’ll get a voucher for a new box of ammo.

I am wondering should I send my rifle back to Ruger and have it checked out by them before using it

Not that I'm aware of
Many years ago my Dad was hurting ground hogs with his sporterized 1917 Enfield in 30/06
I got chewed out when I stopped by after work. His face had bandages on it and the firearm was destroyed, scope was bent the stock was almost blown in half and he couldn't open the bolt.
I used a dead strike hammer to open the bolt. He had closed the bolt on a 8mm round.
I didn't think that was possible, but it was. He was very lucky and he apologized for thinking I tried to kill him

Most bullets are copper jacketed

I’m talking about a composite bullet! Didn’t think about having to explain it

My bad I thought we were talking copper fouling in barrel and I was just pointing out copper jackets build fouling too

No problem, I really didn’t know that and I was just wanting to give you some information I had left out. I’m not a gun guy and don’t reload yet, I will have to do some research and work with my friend who reloads

Was there a delay in between the 6 and 7th round. This may sound freaky but did you stop to check your target or anything? Saw a yellow jacket go inside the barrel on a rifle I was sighting in one time. I had walked down to look at the target and was walking back. Trust me an insect inside the barrel will result in added pressure buildup more than you think..

See above post……you can banana peel the thing too. Like I said, there’s bulged barrels out there that the guy doesn’t even know about…lol.
But in this case, you were dialing in a scope so the barrel should’ve been clear and you would’ve noticed a squib if there was one on the previous shot. You said it looked like a straight walled cartridge. If it was bad brass the case should’ve just separated like it did but if the primers blown out and pocket buggered up, it saw some crazy pressure. The guns safety features did their job. Your extractor survived after you forced the bolt open?

I would definitely consider that.
Or at the very least, a WELL qualified gunsmith.
I can't imagine the bullet co. not demanding to inspect the gun. .... . and/or replace it.

Shakeyjake I tried the bolts action with the brass I had fired before that had no powder or bullet and it worked fine. It locked and ejected the empty brass. I don’t know about a live bullet or after firing as I haven’t fired the gun yet after this incident.

I had some Federal factory rounds in .35 rem split the case necks on 7 boxes of ammo, all the same lot #. They sent me a generous coupon for 10 boxes of replacements.

Vermontster,
When you say "The brass cartridge had blown off the shoulder and neck. It looked like a straight wall cartridge" was the shoulder and neck still in the chamber or was the case short and straight walled? If the case was short and straight walled it seems more likely that it was something like a 308 Win or larger that was accidently chambered and when fired the pressures went sky high from swaging the bullet down to the .270 bore.

Philip, I REALLY doubt Barnes would do that.
Imma gonna go with Byrds response.
A bug crawled up the barrel.

bucksnbears,
Apparently our ideas differ, I don't think a bug would be enough of an obstruction to cause that high pressure. If you look at the case dimensions of the 308 and the 270 the difference between the length of the 270 to the shoulder is 1.98 inches, the nominal total case length of the 308 is 2.015 inches resulting in a 0.035 in difference in favor of the 308. I also remember reading once upon a time about a 308 being fired in a 270 with the resulting case being blown out to straight wall case, with high pressure results similar to the OP.

Philip, you haven't been around long enuff to catch the sarcasim I'm my post.
Just for further reference, when you see a post by JBYRD, take it as GOSPEL!
He's a wealth of (no)ledge.
You'll catch on someday.

we had a Turkish 8mm Mauser that had a slight bulge nothing you could see from the outside by eye , but you could feel it pushing a patch down , for about 1 1/2 - 2 inches almost no resistance then back to tight again.

it shot OK that bulge was about 4 inches forward of the chamber

the case that straitened out , what does the head stamp read

my first though on this was a different round got loaded accidentally like a 308 that would feed and probably even go down the barrel but straiten out the case and go very high pressure doing it.

guys chamber 300blackout 110gr bullets in 5.56 and it generally ruins the upper when they do .308 to .224 is too much but .308 to .277 might just go , be a big squeeze but might do it and squeeze one .031

if you look at the head and it says 270win , but the case is a bunch shorter , then I would look in that chamber very carefully , you may have had a case separation at the shoulder , that can give gas back in your face and hard extraction.

GCP and others. The way he describes this scenario, it's factory rounds from Barnes.


Really doubt it's a mixed headstamp issue.

Ruger WANTS to see this rig.