1. full length sized case, bolt won't close and measure 0.012" longer than fired unsized. Yea brass is flowing to the neck and needs trimming.
2. Partial sizing using full length die, bolt closes with some resistance, this is what I look for with full length dies, (as long as it's light resistance)
3.New 3die set by Lee, everything works good, Does this particular set include the Lee Colet Neck die?
Glad you got it worked out
, Lesson learned - Treat your cases as if they are fire formed to YOUR rifle, and only THAT chamber and size accordingly.