I have been looking for 300 win mag brass for awhile, usually use Hornady or Winchester. Came across some new Federal Brass a while back and bought it. On the third loading the primer pockets were so loose I had to discard them. I have gotten 6 or 7 loads out of the other brass I have used. My loads are not real hot but had to drop down 3/4 grain of powder on the Federal brass as compared to Hornady or Winchester brass. Has anyone experienced this with Federal Brass?