don't have a Montana, but I got a model 7, so does a pard of mine, both love a max load of H414 with Winchester primers and Nosler 100 gr BT. Deer drop like lighting hit them. Very Very accurate. Painless has seen some of the groups.
I may not be smart but I can lift heavy objects
I have a shotgun so I have no need for a 30-06.....
