Problems with Rem 223

[ar15barrels]

Judging by that picture and how all the primers that did stay arent showing overpressure I might say it was just bad ammo with loose pockets.

Oh no, the cases with primers have all sorts of signs of overpressure.

Look closely and you will see where the brass flowed into the ejector hole on the bolt and then was sheared/smeared during unlocking.
Every case in that picture shows extreme over-pressure signs.

[6079Winston]

Since the primers look mostly O.K., except where they are missing, I vote for soft or improperly annealed brass. Has anyone let Remington know about this yet?

[ar15barrels]

Since the primers look mostly O.K., except where they are missing, I vote for soft or improperly annealed brass. Has anyone let Remington know about this yet?

Flattened primers is also a sign of excessive headspace.
You can have a chamber with tight headspace and high pressures will not always show on the primers.
The primer has to back out of the pocket, balloon out and then get re-seated in order to have nice sharp edges.

Best to fire this lot of ammo in a few other guns and see if there is a problem with the ammo, or one particular gun.

[StraightShooter]

Flattened primers is also a sign of excessive headspace.
You can have a chamber with tight headspace and high pressures will not always show on the primers.
The primer has to back out of the pocket, balloon out and then get re-seated in order to have nice sharp edges.

Best to fire this lot of ammo in a few other guns and see if there is a problem with the ammo, or one particular gun.

Thats interesting.... i always thought the primer was the first thing to look at for signs of over pressure. I had no idea there could be over pressure problems if the primers were still rounded. Ill be sure to look for the other signs you mentioned when I do some load development this weekend.

[Jicko]

Oh no, the cases with primers have all sorts of signs of overpressure.

Look closely and you will see where the brass flowed into the ejector hole on the bolt and then was sheared/smeared during unlocking.
Every case in that picture shows extreme over-pressure signs.

+1 to what randy said

commerical RP 223 (UMC?) should be OK..... (altho if you do have another 223, you can give it a try..... )

I think you should contact CMMG anyways (just give them a call, talk to their tech..).... you can easily send them the pictures too

[ChessRatz]

Thanks for all the replies. As AR15 pointed out, there are definitely marks left in the brass. The primers did look a little flatter than the unfired samples I have.

I also had a friend stop by and look at it. He said I should try out some different ammo as well. My Federal XM193 came in so I do have that to try. I will look at the brass carefully and report what I find. Again, thanks for all the help. Nice to be able to get so much information in one place.

[1lostinspace]

Thanks for all the replies. As AR15 pointed out, there are definitely marks left in the brass. The primers did look a little flatter than the unfired samples I have.

I also had a friend stop by and look at it. He said I should try out some different ammo as well. My Federal XM193 came in so I do have that to try. I will look at the brass carefully and report what I find. Again, thanks for all the help. Nice to be able to get so much information in one place.

M193 should have greater pressure the 55gr Remington plinking ammo.

[Jicko]

"M193 should have greater pressure the 55gr Remington plinking ammo. " <- YEAH.... and... if it is REALLY a chamber problem.... firing a M193 may result in a KaBoom!

So, it is BETTER to figure out if your batch of commercial 55gr Rem is bad by testing them out on a different gun.... if they are OK... then it is YOUR gun's problem.

[Fantasma]

My Saiga Feeds .223 Like a dream!

[1lostinspace]

My Saiga Feeds .223 Like a dream!

and then send them to the moon with a dent in the case

[1lostinspace]

"M193 should have greater pressure the 55gr Remington plinking ammo. " <- YEAH.... and... if it is REALLY a chamber problem.... firing a M193 may result in a KaBoom!

So, it is BETTER to figure out if your batch of commercial 55gr Rem is bad by testing them out on a different gun.... if they are OK... then it is YOUR gun's problem.

he has a point maybe you should get more plinking ammo and test if not a different rifle. but be careful with m193 you might rupture a case in your chamber load just one round at a time and use a string

[ChessRatz]

Looks like testing the Remington in a different rifle makes the most sense. I just need some time to get up to the range. I surely don't want anything to happen that could hurt anyone or the rifle. Thanks all.

[Eric_Oh]

keep us updated on what cmmg has to say... i was about the put in an order for 16" cmmg upper just now.

[Jicko]

keep us updated on what cmmg has to say... i was about the put in an order for 16" cmmg upper just now.

Order with confident.... they are one of the good guys.... they will definitely take care of it for you if the fault is on their ends...

[Jicko]

"M193 should have greater pressure the 55gr Remington plinking ammo. " <- YEAH.... and... if it is REALLY a chamber problem.... firing a M193 may result in a KaBoom!

So, it is BETTER to figure out if your batch of commercial 55gr Rem is bad by testing them out on a different gun.... if they are OK... then it is YOUR gun's problem.

This is dupe, but a reminder..... don't do anything stupid....

KaBoom!

http://www.youtube.com/watch?v=tWygoxV_ApM