I've been using one of these now for about 3 years for .308. I've gotten a good "grab" of the case on the shank of the bullet with different brands of cases from mil-surp to Norma, which I'm using now, & fantastic accuracy, even at 200yds with Federal 210m primers & minimun charges of Hodgdon's Varget in my Rem. Varmint Synthetic. But I just bought another one for .303 British & some new Win. cases as well as some mil-surp ammo & when I neck-size the Win cases it doesn't size them down as much as the Sellior & Bellot mil-surp cases. Am still testing for accuracy, but, again, with min chgs of Varget & Fed 210m's accuracy is surprising from a "worn-out" jungle carbine. Might want to contact Lee in Hartford, Ws., to get their take on this. I might, myself. Good luck. jd45.