At an estate sale yesterday I found a brass stripper clip (no markings, no dimples, steel spring) loaded with 5 rounds that appear to be 8mm. Brass cases with no headstamp - the primer is flat and there is a circle in the case surrounding the primer. The bullets have a reddish color just above the neck. There were also some fired rounds with 2 flash holes visible inside and a second unloaded clip. Any ideas on what these might be? Thanks.