I have had this on two occasions with different barrels, both times load testing with cfe223 like the title says. Anybody have any ideas? The ring is copper not brass and it was located just in front of the chamber, it is sitting in the barrel loose and easily comes out with a bore snake. just curious....
Weirdness with CFE223, have you ever seen this?
- Thread starter DeltaRogerVictor
- Start date
What are you running for heads, caliber and barrel? looks like a jacket failure maybe but I've never seen one stay in the barrel? Any chance your shooting a lot more velocity than your old load?
Hmmm...I just ran 900 rounds through a rifle with CFE. Didn't see anything like that when I finally cleaned it. And, I was surprised at how quickly it cleaned up (though it is a Tikka, which never seem to foul much anyways)...
Maybe a burr/gouge in the leade/throat stripping off jacketing material?
Maybe a burr/gouge in the leade/throat stripping off jacketing material?
Proof Research 20" 308 win spun up by SAC on a Remington action, sierra 155tmk, once fired Lake City Brass, federal 210 primers. using Hodgdon's load data for CFE223 (which is really fucking warm by the way). Barrel had 123 rnds on it since it was last cleaned. I think I am going to put the TMK's on the back burner again, I have never had any luck getting them to shoot. Probably just go back to old reliable Varget and 175 smk's, I was just curious if anyone had seen this before. The other time I had it happen it was with a bone stock Remington 5r (about 3 years ago), but I lost the ring at the range before I could get a picture. To clarify this did not come out during cleaning, this was lodged in the bore when I went to check clearance for a magneto speed, half way through the load testing. Proof barrel gets some shift with magneto speed, so I group test then, group test again with chrono attached.
Are your bullets seating with ease in the press? Also are your cases sharply chamfered? I can imagine seating a bullet in a sharp case mouth could do something like that, but I don't think it's the powder.
running .002 neck tension this time around, I was using rcbs FL dies last time so I have know idea on the previous loads.
I do think it is powder related as both times that I have seen this I have been doing load work up with CFE223, I use a lot of varget, some RL15, imr 4166, and imr 4064. The ring only seems to occur with CFE223.
Something is cutting your bullet's jacket. This is not powder related. Are your cases chamfered? Have you got a bore scope, or have a friend with a borescope? A quick check of the lead would tell if there was a problem there. It's rather baffling, as I can't imagine any way to uniformly cut a ring from a boatail bullet's jacket, were I to try. Perhaps there was a case that didn't get chamfered...
Wayne
Wayne
What does it measure, I.D, thickness, width? Might help you narrow it down. Anything funky going on with the boattails of the TMK's? Any wild, unexplained fliers that would indicate bullet failure?
There is a possibility: when the bullet was swaged in the point up die, the seating punch that forms the B.T. could have pressed a ring/crease into the base as the bullet point was being formed. Same thing could have happened when the core was seated, to much pressure there and the jacket will crack right at the base. If it was a bad punch, the whole box would show this. Or an untrimmed jacket got into the production run, everything got squeezed and the over flow of jacket material went to the base. A fat bullet with a damaged B.T. You would have noticed when seating. Or the jacket was cracked during core seating.
A lot of bullet dies are designed to have a .0002-.0004" fat base. Better gas sealing. If they get to fat, pressure builds up pretty fast or they blow up right out of the muzzle.
This is all assuming it is jacket material, and a somewhat wild assed guess on my part. How CFE 223 could be involved, I have no idea.
There is a possibility: when the bullet was swaged in the point up die, the seating punch that forms the B.T. could have pressed a ring/crease into the base as the bullet point was being formed. Same thing could have happened when the core was seated, to much pressure there and the jacket will crack right at the base. If it was a bad punch, the whole box would show this. Or an untrimmed jacket got into the production run, everything got squeezed and the over flow of jacket material went to the base. A fat bullet with a damaged B.T. You would have noticed when seating. Or the jacket was cracked during core seating.
A lot of bullet dies are designed to have a .0002-.0004" fat base. Better gas sealing. If they get to fat, pressure builds up pretty fast or they blow up right out of the muzzle.
This is all assuming it is jacket material, and a somewhat wild assed guess on my part. How CFE 223 could be involved, I have no idea.
