Now heres 1 for you all.... I have been given a set of rcbs dies for my 308. Now following the intructions I ran 100 once fired sako cases through the f/l sizer. Now I did this before I had my rifle. Now on getting the rifle Ive tried the brass and f me it wont fit. My mate has been over for cuppa and he brought some f/l sized for his rifle and they were spot on. Now that brass has been fired in his rifle and worked back 2 thou. What do you think the problem is??