Your load sounds OK but, an off center primer pocket ? Hmmmmmmm .
Do you have a hand drill..... or better yet a drill press ?
Use a "military" type decaping die to keep from breaking pins, then use about a 1/4 in. drill bit in youre drill press to remove the crimp.
You may have to alter the bit's cutting angle slightly on a grinding stone, but it will take out a three point pinch or rolled type crimp..... it will not make your primer pocket off center.
You need only to remove the crimped metal, be careful not to remove any part of the pocket wall.
Youre only reason for this tedious operation it to alow a new primer to ENTER the pocket freely.
OPEN OR OUT
Ralph in In.