While working up a load for my new rifle I had a piece of brass stick in the chamber and it was really hard to open the bolt. I insected the brass and found what you hopefully see in the pics. It looks as though the bottom shoulder deformed while firing or was deformed prior to firing. The load was 42gr of H4350 under a 140gr VLD. The brass is new Winchester 7mm-08 necked down in a RCBS FL sizer die.
Pressure or bad brass
- Thread starter mnhntr
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I am almost certain you are not seeing pressure. Your load is a few grs below Hodgdons recommended starting load and any load I have used in my 708s with the same powder.
I am not sure what you are looking at in your pictures and see nothing in the shoulder area that looks out of place, but believe it is the "pressure ring" that forms at the point the solid case wen ends and thinner walls start at the base of the case. it is normal and nothing to worry about.
Perhapes the primer is backing out slightly and you are feeling the drag from it pressing on the bolt face?
I am not sure what you are looking at in your pictures and see nothing in the shoulder area that looks out of place, but believe it is the "pressure ring" that forms at the point the solid case wen ends and thinner walls start at the base of the case. it is normal and nothing to worry about.
Perhapes the primer is backing out slightly and you are feeling the drag from it pressing on the bolt face?
788Ham
Member
Looks like its a tad bit deformed just above the extraction groove, if it bothers you, I'd just toss it and your good to go. Once in a while you'll run across one like this, just a factory goof, no big deal.
Strongbad
Member
+1. Looks like a QC issue. I'd probably chunk it and start over.
gamestalker
member
I see what your referring to and in my opinion it is deformed brass, not a pressure caused circumstance. I haven't looked at the Hogdon data for that powder, but assuming it is among the slower burning powders for that 7-08, I would error on the side of caution regarding reducing the load too much, or you may encounter some pressure inconsistencies, or spikes.
rcmodel
Member in memoriam
Definitely a bad case.
The extractor groove cutter machine done cut it off-center & crooked somehow.
rc
The extractor groove cutter machine done cut it off-center & crooked somehow.
rc
NCsmitty
Member
+1 on rcmodel.
I would not use those cases, see what Winchester says about replacing them.
Your load of 42gr of H4350 is too low according to www.hodgdon.com, where they list 45gr of H4350 as a start load with a 140gr bullet.
NCsmitty
I would not use those cases, see what Winchester says about replacing them.
Your load of 42gr of H4350 is too low according to www.hodgdon.com, where they list 45gr of H4350 as a start load with a 140gr bullet.
NCsmitty
243winxb
Member
If brass is not defective, maybe-
What is the loaded rounds neck diameter? .2970" is maximum. If to fat, crimping bullet in case, pressure will be high. My 2nd guess is the bolt face is not square to the chamber. 3th its bad brass from the new employees & equipment at Win. when they moved the factory http://www.saami.org/PubResources/CC_Drawings/Rifle/260%20Remington.pdf
243winxb
Member
This photo looks like the primer has flowed into the firing pin hole. A pressure sign.
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