I tooled up to load Sig 357, As I wanted to play with this round . the problem is the LOA 1.135 , it will go from 1.135 to 1.145 or 1.130. I use brass that is all one time fired the same head stamp (Speer) cleaned, Redding dies dillon 550 every thing is clean the load is #A9 and speer 124 gr, XTP (sig) I have taken the seating die apart and cleaned it 4/5 times , I tryed belling the case from almost no bell to way to much bell. I started out using Redding taper crimp die . I ajust the LOA to 1.135 then the next round will be 1.130 to 1.145 . I know it has something to do with the neck of the case , I thought the crimp die might be part of the problem so baught a Lee FCD and it still will do the same thing. So I ask anybody that loads the 357sig if they have the same problems , and what will it take to make good reloads with it ?? PS. I full length resized the brass.