223 neck soot

[earlcurtis67]

noticed today that all the fired case had a good amount of soot on the necks. I haven't changed anything from the previous reloading of these cases, same case length, sized neck diameter (same), same powder from the same can, same primmer etc. etc. The charge weight is on the light end but I'm using mag primmers. Load is very accurate. Only thing I can think of is cases have not been anneled as they have only 4 firings. brass is LC. I have not yet put these loads through a chrony.
i have been thinking I would eventually try the CCI BR primmers and try to get a heavier charge weight to work.
Do you think annealing is the problem or should I work up another load and bump up the charge weight?
current load; 69gr sierra HPBT match
22.5gr IMR 8208XBR
CCI 250
2.005 ogive
4Xs fired LC brass
factory Savage model 10 tactical

 

[DHD]

While annealing won't hurt anything (I anneal each firing for everything), I suspect you answered your own question with the load. I use 23.2 of 8208 for the 73-77 grain bullets.

However, if it's accurate and you don't mind swabbing your chamber (can't be any worse than an AR' s chamber), why change. I won't get into primers increasing/decreasing pressures other than to say I use them all interchangeability depending on which is the most accurate with the bullet/powder combo.