I need some advice on my first custom rifle, all input is welcomed. I currently have a Rem 700 7mm Ultra Mag, my plan is to take the action off and have it blueprinted, add a new barrel and new stock and chamber it in a 7mm WSM. My reasons for wanting to use the long action is #1- it is what a have for an action to build off of, and #2- I want to use the longer bullets like the 168 Berger VLD's and have them be able to fit in the magazine. I've been reading on here about "throating" the 7WSM for the VLD's but what exactly does that mean or do, and would I even need to do that if I'm using a long action? Also if it is throated for the VLD bullets will they be the only kind of bullets that it will shoot? Thanks in advance for any and all info, advice, and thoughts, it will be greatly appreciated.