I have 2 BAR's. One is a 7MM and the other is a 300 Win. I reload all my ammo and it works fine but I have found that they are a little finnicky. For instance in my 7MM it will only work with new brass. It will not work with the brass fired from itself once before. It jams every time with the fired brass. Now my 300 Win. will accept any resized brass, it is not finnicky at all. I like the BAR's. Shot my moose with the 300.