Hoping an experienced reloader can set me straight. I have been using the Lee Collet neck sizing dies for my rifles. I have fired some of the brass maybe five times and the last batches had loose fitting bullets. I adjusted the dies and applied more tension and that seemed to fix things. In my 260 I tried new bullets, 120 NBT in place of 140 Sierra's without changing the depth and I had one bullet lodge in the barrel. Guess I applied a little pressure when chambering- no -I never fired it but the bullet stayed lodged in the barrel and the case itself extracted. I figured it was an ogive\seating depth issue and readjusted the die at home. I tested chambering them after but ....are these issues an indication of a problem with my brass? I am thinking I need to measure and trim my brass -am, I on the right track? It always sounded like neck sizing eliminated the fuss but do I need to run all mine through a full length sizer - something I have never done and I don't have FL dies for all calibers I reload. What about annealing? What is my next correct step? I saw some say they run new brass through a FL sizer which seemed strange to me. I know I am opening myself up to some ribbing but could sure you some expertise.