I annealed 200 rds of Lapua .308 brass on my pals Annealez machine the other day, seems to work great. My question for everybody is, that a handful of them showed a bunch of pink coloring halfway down the case, where most of them had the typical light coloring at the neck and shoulder. Does anybody know what would cause the pink color?
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Random color change from annealing?
- Thread starter Agent Clark
- Start date
Could be surface chemicals with the temp of the flame on brass. Best answer I could find on google.
Dont think cases are ruined. Only way to know is a crush test
Dont think cases are ruined. Only way to know is a crush test
Yes, he has the green tempi lac, I'm pretty sure it's 750. I was thinking surface chemicals too, maybe old case lube or cleaner. It was like 5 pieces out of 200.
People that solder silver to brass report a pink surface coating. Apparently, copper from the brass moves to the surface. Silver solder can use a low temperature alloy (~360F) or a higher temperature alloy (over 800F), so I guess it may be possible to cause a similar process during annealing.
i just got an amp annealer, did 600rds there was a color change, i then resized them and ran them trough my frankford tumbler with no pins just to get the sizing lube off. after that i couldnt even tell they had been annealed. all color was gone
ctso make a good point... I tumble a second time for 15 minutes to get caselube and misc tempilaq off. Usually can't see any color from being annealed
When I was using dry lube, I just put them back in a box and loaded as needed, but the dry lube isn't quite enough, I'm getting heavier marks when sizing, so I'm back to paste lube and re-tumbling for now.
