I did the 7RM to 7 STW in a push feed Mdl 70
Mag box length is the issue w mine.
Limited to an OAL of 3.590 in my rifle to get them in the mag box.
Brass is hard to find and expensive when ya find it.
It can be made from 8MM Rem Mag or 300 Weatherby brass.
Had to buy a Whidden collect die to properly resize the cases which was just short of $100.00 in addition to the full length die set.
However 140 Accubonds at 3400 fps makes a helluva beanfield deer rifle.
And I think you'll find it has almost a cult like following.
