check this page, this is what you're looking for... http://www.shortmags.org/shortmags/r...dimensions.htm
Don't have a fax, but the 300 is the same as your brothers and my fathers to the shoulder. They are all the same OAL, but the 7wsm has a .50" shorter neck than the 300, so that's where they robbed the extra shoulder length from. [img]images/icons/smile.gif[/img]
He should be able to chamber the factory 7wsm stuff if he needs a new throat yet by just running the reamer in another .038" though, shouldn't even have to set the barrel back on this one. [img]images/icons/smile.gif[/img] [img]images/icons/smile.gif[/img]
My dads going to get the Norma 300wsm brass next time, maybe they'll grow in thickness a little, we'll see. He's got about .004" total clearance by comparing formed ones with loaded ones that had a couple thou turned off them, should get back a thou or so anyway and be closer to .002" total.