Shot case very sooty

joncarnage

Well-Known Member
I have 6.5x55 and I've shot 100+ of this round same brass, heads, grains etc so changed nothing and it's just started to get very sooty around the spent case. I cleaned the rifle barrel and the chamber but this hasn't improved the situation. Aim and velocity are just the same, any ideas?

Jon
 

Primer

Well-Known Member
I've had this very same problem on my 6.5x55 and will be updating my main post tomorrow.

Are you full length resizing or neck sizing as I found the problem happened mostly on the full length resized cases that I tested yesterday.
Also how many times have you loaded the cases as the necks may need annealing
 

joncarnage

Well-Known Member
Just neck sizing so tried full length again no change i.e. No worse or better? Cases been loaded about 6 times, lapua cases
 

deeangeo

Well-Known Member
Anneal the cases. The problem is the brass is not sealing in the chamber as the neck/shoulder area of brass has lost its elasticity. Annealing should cure the problem, then F/L resize to correct headspace dimensions. Re-anneal approx 3-4 firings. The brass should then last for a considerable time.
 

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