COW, SR4756, Lapua Brass and 243AI

[mjbine]

Well I finally started to fire form my brass for my 243AI. I decided to use the COW method. I have two Lyman 1200s, one with SR4756 and one with cream of wheat. I wanted to fire form 100 pieces of Lapua brass. This is the load that I used to make it happen. 11 grains of SR4756 and 24.5 grains of cream of wheat and stuff poly filler in tight at the top of the neck. It worked perfectly and I ran a nylon brush every 10 round to keep it clean. It is saving some barrel life. Now it is time for some load development.