Don't know why it would be any different than the normal short mag stuff. If your worried about it though you could always cut the neck off of some short mags then resize and trim them to what you want. I do this for my 260 ackley cases buy cutting off the neck of 30-06 lake city match cases i have then size them to 308 then 260 to fire form. Its the long hard way of doing it but it works.