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Author Topic: Rifling marks on a 223 neck HELP!  (Read 1285 times)

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Offline JON8777

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Rifling marks on a 223 neck HELP!
« on: March 27, 2009, 05:18:58 PM »
Long story short, I have been having troubles with a 223 rem brl for my Encore...

Tonight I went out to reload a few rounds to hunt with tommrow morning. After a quick run of once fired brass I wiped off the lube and did a once over visual inspection... 75% of the cases had the land and grove marks on the mouth of the case.

I trimed my cases to 1.760" on the last load, and the marks start at the 1.745" on the once fired brass....

Anyone have this happen to them???
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Offline pozoutdoors

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Re: Rifling marks on a 223 neck HELP!
« Reply #1 on: March 27, 2009, 08:10:07 PM »
I would almost bet that they were fired though an ar-15!! My ar-15 leaves marks on the cases from the feeding ramp!! They still work fine. I haven't had a problem with them!!! Good luck and happy shooting!!! :)
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Offline Ladobe

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Re: Rifling marks on a 223 neck HELP!
« Reply #2 on: March 27, 2009, 10:45:30 PM »
First up, DO NOT shoot this ammo, pull the bullets and powder.   With the neck jammed .015 the pressure is being driven way up.  Depending on how hot your load is you have a disaster in the making (aka bomb).

BTW, 1.760 is max length for the 223 Rem in a SAAMI chamber... 1.750 is the normal trim length.   So trim your brass again to 1.750.

Since you said once fired brass, are the marks more or less in an even pattern all the way around the mouth of brass as they would be from the lands/grooves?   If so they wouldn't be feed ramp marks as once fired.    Could be you have a short chamber. 

Time to get some Cerosafe and do a chamber cast.   I'd do that just so I'd know for sure, but if it is a short chamber, send the barrel back to TC for a new one under warranty.
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Offline troy_mclure

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Re: Rifling marks on a 223 neck HELP!
« Reply #3 on: March 27, 2009, 10:49:30 PM »
some advise on the cerosafe, make sure your extractor is down when you pour.
dont ask how i know this ::)
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Offline JON8777

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Re: Rifling marks on a 223 neck HELP!
« Reply #4 on: March 28, 2009, 11:35:44 AM »
I thought about cerosafe.... scopes comming off the brl ad its going back to TC.... Over the years this is the 4th brl (one from Rem, ruger and green mountain) that I had chamers that came from the factory in one state of non functioning or another. All the brls I got back went back over and over till I got new ones.

By the time they get some glue sniffing repair guy to reream the chamber, the guns goes from shooting 5/8" to something that looks like 00 buck shot at 80 yards...

Just hope they send a new brl rather than giving UPS another route.
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Offline sk330lc

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Re: Rifling marks on a 223 neck HELP!
« Reply #5 on: March 29, 2009, 02:16:31 PM »
You said this was once fired brass?  was it once fired facory rounds, or once fired new brass hand loads?
If it was Factory loads are you sure, your not seeing the Factory Crimp in four spots ? Can you show us pics?
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Offline JON8777

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Re: Rifling marks on a 223 neck HELP!
« Reply #6 on: March 29, 2009, 03:02:19 PM »
pics of brass are a pain.... and yes the rifling is indented into the neck... not burn marks

 

 
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Offline JustaShooter

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Re: Rifling marks on a 223 neck HELP!
« Reply #7 on: March 29, 2009, 04:16:29 PM »
that doesn't look like lands & grooves from rifling to me.  Are those pieces of Winchester brass by any chance?  Most of my .30-06 Winchester brass has almost exactly the same markings in the exact same place.

Just a Shooter
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Offline JON8777

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Re: Rifling marks on a 223 neck HELP!
« Reply #8 on: March 29, 2009, 04:26:09 PM »
Reamington brass... I checked the brass before it was ever shot for any marks....

I went thru the other 100 rounds of another brand of brass with the mag lite and they have the same marks.

Its 6 groves... same as the brl... Looked down the chamber... somethings wrong
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Offline Ireload2

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Re: Rifling marks on a 223 neck HELP!
« Reply #9 on: March 29, 2009, 05:13:08 PM »
Guys those are factory crimping marks. They are not rifling marks.
There is nothing wrong.
BTW your chamber is probably .030 longer than the trim length. Cast your chamber or measure it by other means and you will see that the marks were not caused by your rifling.

EDG
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Offline Lon371

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Re: Rifling marks on a 223 neck HELP!
« Reply #10 on: March 29, 2009, 08:51:15 PM »
 Just a suggestion to calm down the croud, Can you also post a pict of the unfired brass? Thought it may help.  ;)

Lonny
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Offline sk330lc

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Re: Rifling marks on a 223 neck HELP!
« Reply #11 on: March 30, 2009, 03:46:08 PM »
I would say it is the factory crimp marks.  If it was Hitting the lands you would not have a distinct Line. It would be a tapper, with it starting at the rim of the neck back to the shoulder.  If you have some Old bullets start one in the chamber and tap it with a dowel rod and hammer. then drive it back out with a cleaning rod .  compare the marks on the bullet to the brass. 
Your right about taking pics of brass I just tried 10 times to and could not.
The Remington Factory 223 Loads I have with the 50gr accu tip Have the exact marks.   
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Offline Slowpoke Slim

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Re: Rifling marks on a 223 neck HELP!
« Reply #12 on: March 31, 2009, 04:28:54 AM »
I agree that those marks are factory crimp marks. There's no problem here. I have several batches of brass with the same marks from various brands of once fired brass. The marks are from a "collet" style crimp die, and the "lands" are from the gap between the collet fingers.

I'll try to dig some out and take pictures sometime today, but like you said, it's a pain to get the picture right. Your pictures came out great by the way.

Like I said, I have the exact same marks on some of my brass, and I know I don't have a chamber dimension issue.
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Offline Lone Star

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Re: Rifling marks on a 223 neck HELP!
« Reply #13 on: April 01, 2009, 03:57:14 PM »
If those actually were rifling marks, you'd have a lot more to worry about than a short chamber.  With the lands taking up 90% of the bore, your pressures would be high since for practical purposes you have no grooves and would be pushing .224" bullets through a .219" hole.  Don't sweat it, it's perfectly normal.



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