I have read in some previous threads about modifying Lee collet dies for use in neck sizing for the 7.62x54. What calibers will work and what modifications will need to be made? The 303 brit would be good because it would have the proper size mandrel for my rifles as they are both close to .312. Both of my full lenght dies, Lee @ Lyman , are set up for .308. Replacement expanders are avaliable but I use the one for my .303 brit. I would prefer to neck size so a collet sit up for the proper dia. would be great. Any advice would be greatly appreciated.
beemer