Question - Why not make an over/under double rifle with the barrels in different calibers? For example one barrel could be in a long range caliber like 7MM STW and the other be in a stopping caliber like .458 Lott. One would probably sight it in perfectly for the long range caliber and as long as the short range stopping caliber were close at short range that would be good enough. Also, with some of the new vairiable power scopes having a 5:1 power range, a scope like a 2-10X variable would be almost ideal for both calibers. Would not this combination be good for a hunt for caribou or wolf in Alaska where one might run into a bear?