Nice pistol. Do not detail strip it unless you are competent with firearms. I did that one that my friends father owned. Went to look for a diagram to put it back together and discovered that manuals are almost non-existent and it is considered one of the more difficult firearms to put back...
I thought I was losing my damn mind while measuring base to tip of bullet. Finally got a ogive gauge and suddenly my measurements became so much more consistent.
I would trash the brass that popped primers and carry on with the rest of the brass. For precision though, you may consider sorting the brass by headstamp and year, and working up a load based on one group of matching headstamp/year.