I don't have experience comparing them to Winchester brass, but I was able to use the identical load with ADG .300wm brass that I had previously been using in my Nosler brass, with velocities within 5 fps of what I was getting with the Nosler brass and no change in group size. I was very impressed...only have a couple firings on the brass so far though.Has anyone used ADG brass in the 300 win yet???? How many grains of powder less the Winchester brass???? I am wanting to start load work up with the 168 gr Bergers... Any help as a starting place with ADG brass would be helpfull... Dave