What about metric calibres eg Mauser 66 with 6.5X68 and 9.3x64 barrels, spare bolt and trigger group and a bolt in 500 Jeffrey, and, if you count the Mauser as one rifle, a 12ga/9.3x74R drilling.

In fact the drilling could do everything from mice with a 22LR insert using shot loads to ele with the 320gn Woodleigh solid.

mike