I would definitely call Lapua....I called them on some 6.5x47 Lapua brass that had to thick of rims to fit in the shell holder. I told them I had 47pcs out of a box of 100 that had the problem. They sent me a new box of 100 and told me to scrap the misfit cases. At the price of Lapua brass these days, might pay to make a phone call.