Re: Belted magnums reloading, from scratch
The biggest error that is made when reloading belted cartridges is to resize them too much. Most of the stretching that occurs when they are shot, occurs just ahead of the belt. If you resize them too much, that stretching will make the area in front of the belt very thin (to the point of seperation).
If you push the shoulder back .001" only, you will be headspacing off the shoulder (just like your 30-06) and you won't have the issue.
So when you setup your die, don't just screw it in until it touches the shellholder, this will push the shoulder back too far and cause the problem.
Hopefully this made sense,
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives