I have a custom 7mm that the builder worked up a load for. I got 50 loaded cartridges with the rifle and am slowly shooting them away. I'm starting to reload and gathering everything I need BUT I cannot find Winchester brass anywhere local or on the web for a 7 mm Rem. Mag. I have found some other brands like Norma, Federal , and Noslar custom that are backorderable. Will changing brands effect anything ? Or does anyone know where to get some Winchester brass ? Thanks Allen