I have loaded the 270WSM for a number of years using Winchester, Norma, and Remington brass. The Norma brass is by far the best. It is more uniform and durable than any brass that I have used in my 270WSM. The Norma brass in heavier than the others and it has slightly less capacity. You will not notice a great deal of difference unless you are at max load using Win and you load the same amount of powder in the Norma brass. Work up your load with the Norma brass and you will be very happy with it. I have some brass that I have loaded 10 times or more and the primer pockets are still not loose.
