Thread: Soot On Case Bodies

What's happening is I'm getting soot down the length of the case, sometimes all the way to the bolt. Normally I just see soot on the neck and shoulder. Is it a problem?

Some information:
The cases are Norma 6.5x55. They have been fired 8 times with no annealing. The shoulder is bumped back 0.002-0.004" on resizing. The load is 49gr of AR2213SC with a 120gr projectile. The estimated pressure is 3245bar with the max for the 6.5x55 SE being 3800bar.

I have several theories as to why this is happening:
The pressure build up is too slow, allowing some initial blow by.
The cases are too hard to seal correctly.
The shoulder bump is too much for the cases.

Thanks for any input.