even with only 100 thou of free bore (very short) you still can't seat amaxes in a model 7 7 saum and reach the lands, if you are even mildly ocd about reloading then generally you mess with seating depthQuote:
Plenty of 7mm saums run good as in model 7s, if it's that much of a worry get the chamber set back so you can find the lands, that would be an easier option than wildcatting the case
I have been known to miss or maim one load per rifle and a full mag for me