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725
08-08-2011, 01:30 AM
Don't know if this is the right location for this question, but here goes: Barrel Ring -- I know what it is, my question is what causes it? Anybody out there who might explain it to me?

waksupi
08-08-2011, 01:48 AM
That usually means you had a squib load, and fired another round into the bore obstruction.

flounderman
08-08-2011, 06:04 AM
we had some dcm 30-06 ammunition years ago that was said to cause a ring. supposed to be machine gun ammo. the dcm replaced it when it was discovered. the ring was just ahead of the chamber as I understand.

GabbyM
08-08-2011, 09:25 AM
The cause is an extreme pressure spike. What brings on the high pressure can vary.

John Taylor
08-08-2011, 09:53 AM
Even snow or dirt can cause a ring. See most of them on 22 rim fire and revolvers.

725
08-08-2011, 04:01 PM
How does this phenomenon relate to using a filler or ldpe wad?

quentin
12-23-2011, 04:55 AM
The other one I have been told is excessive oil in the bore.

When fired uncleaned the oil can not compress (& is not pushed out fast enough) therefore acting as a bore obstruction.

Pretty sure I have done exactly this to a 7mm of mine... :sad: