I am using the Lee Collet sizer for my 250 Savage. I just returned from the range and found that my full length sized rounds were fine. The loads you guys helped with were perfect. Anyway, the brass that I necksized had a problem with some of the bullets not being held tightly by the neck of the brass. In other words you could push the bullet down in the casing with your finger. Some could be pushed with ease and some took a little pressure. Then some could not be moved at all. I sat the loads in question off to the side. Now I am reading my instructions that came with the die set. It says "Check to make sure the neck has been sized enought to securely hold a bullet. Extra bullet grip can be obtained by screwing the die in an extra quarter turn. You will reach a point that no further bullet tightness is possible." Is this looseness of the bullet that I am experiencing what this is talking about? Has anyone had this experience before? By the way, I did use the same brass manufacturer for these loads. This occurred only with the neck sizer, the full length sizing die worked great.