I was recently loading some 45 acp using Lyman carbide dies. I noticed on some of the brass I was getting a very fine line around the bottom of the brass. It went about a third to half way around the case. It was at the bottom of the case just above where the rebate starts above the rim. You can feel it with a thumb nail on the outside but not with a paper clip on the inside not all of the brass had this line. It was range brass I bought here on the high Road. Any ideas what caused this and is the brass safe to shoot. Thanks for the he;lp on this.
Line on brass
- Thread starter tickfarm
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Arkansas Paul
Member
Did you size and deprime yourself?
Or was it ready to load when you received it?
It sounds like marks from the sizing die to me. Sometimes it removes tarnish from brass and leaves a visible ring around the bottom.
That would be my guess.
Or was it ready to load when you received it?
It sounds like marks from the sizing die to me. Sometimes it removes tarnish from brass and leaves a visible ring around the bottom.
That would be my guess.
rfwobbly
Member
1) All brass expands to the size of the chamber in which it's fired.
2) Chamber sizes vary between different pistol manufacturers.
3) The exact alloy of the brass varies between different manufacturers.
When retrieving "range brass", you obviously get a wide variety of the variables from the 3 statements above. Some of these cases are larger in diameter than what your pistol may typically produce. Your Sizing Die is designed to take any diameter brass and squeeze it back to a standard size. But due to the die's lead-in radius and shell holder position, that die cannot size the brass all the way to the rim.
Therefore, there will be a place where the downward sizing action comes to a stop. On some larger diameter cases with soft alloy, this may appear as a line in the metal. It's not optimal or highly aesthetic, but rarely will it hurt the function of the brass case. Especially on low pressure cartridges like 45ACP.
I'd load it, shoot it, then not pick up next time.
2) Chamber sizes vary between different pistol manufacturers.
3) The exact alloy of the brass varies between different manufacturers.
When retrieving "range brass", you obviously get a wide variety of the variables from the 3 statements above. Some of these cases are larger in diameter than what your pistol may typically produce. Your Sizing Die is designed to take any diameter brass and squeeze it back to a standard size. But due to the die's lead-in radius and shell holder position, that die cannot size the brass all the way to the rim.
Therefore, there will be a place where the downward sizing action comes to a stop. On some larger diameter cases with soft alloy, this may appear as a line in the metal. It's not optimal or highly aesthetic, but rarely will it hurt the function of the brass case. Especially on low pressure cartridges like 45ACP.
I'd load it, shoot it, then not pick up next time.
someguy2800
Member
yes, pictures needed
tightgroup tiger
Member
It sounds like where the die stopped from resizing the belly bulge of an unsupported chamber. The bulge will only be on the side where the unsupported area of the chamber was and so it gets sized harder than the rest of it because it's bulged out more. That's why the line doesn't go all the way around.
As Arkansas Paul and rfwobbly said, it's where the sizing die stopped.
But like Rule3 and Someguy2800 said, pictures would be nice and would help confirm what we are thinking.
As Arkansas Paul and rfwobbly said, it's where the sizing die stopped.
But like Rule3 and Someguy2800 said, pictures would be nice and would help confirm what we are thinking.
LD-Ordie
Member
Sounds to me like a Glock smile.
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