Why not full length size and headspace off the shoulder? Only thing you need to do is learn how to set your die to bump the shoulders .02. The problem with most belted Magnum Shooters is that they set there dye to touch the shell holder which gives them way too much shoulder clearance. Of course, the load is still safe to shoot because the case would still headspace off of the belt, but case life would be dramatically shortened.If you go with the belted case, forget about head spacing on the belt. Neck size and head space on the shoulder.