Tom's absolutely right. I got a little nuts several years ago when working up a load for one of my 270's and forgot all about magazine constraints. Had it shooting great, but found myself in the woods the first day of deer season with a single-shot bolt action as I was unable to load the magazine due to the bullets being seated out too far. I was dumb enough to admit it on here, and Mossy33oak put the rasberries to me, which I certainly deserved. A word to the wise......