I've just started to work up loads for my 300wsm and am curious what primers folks are using. The first set of loads I worked up I used Fed 215's, but I'm not really convinced that you need a magnum primer for this round due to the short/fat powder column. I've read a few posts on other forums that suggest that by using a standard primer, like a Fed. 210, you'll actually get a more consistent powder burn. Thoughts?