you were right at first posting!!!
Readyrod,
..."How about if I used a rifle? I don't really want to get a 375 but how about a 30-06 with heavy bullets?"...
there was nothing wrong with the 45/70 you originally mentioned. unless you are wanting to use the same iron for extended range hunting. also, the ancient 45/70 is actually better for stopping an enraged brownie than most all of the high velocity smaller caliber magnum chamberings. same due to better straight line penetration characteristics of slow, heavy lead slugs. especially with some of the newer fandactory loadings to hit the market lately.
a lever action is almost always faster to cycle than a bolt. sure there are those who practice from dusk till dawn and can manipulate bolt actions at speeds that will embarrass mere mortals with semi-auto 5.56x45mm AR-15's. but can you afford that much time and ammo? also, the 375HH is based on the longest hunting rifle action i have ever shot. one needs to be carefull when pulling back the bolt, lest they shouldst bleedeth their nose.
as advised by other posters before, the garrett 420-GR SUPERHARDCAST GAS-CHECKED HAMMERHEAD AT 1650-FPS.
this is not +P ammo, and is within SAAMI pressure requirements.
pls see:
http://www.garrettcartridges.com/products.asp
http://www.garrettcartridges.com/new1.asp
NOT wallet friendly ammo, but niether is another rifle. the same could be said about a chopper ride to the local, or in your proposed far north back packing scenario, not so local ER. this assuming you live through the event, AND are found by a door-to-door tundra fertilizer salesman. who happens to own and carry a satellite phone.
it is still my opinion that for strictly bad breath range self defence, the 12ga pump with slugs is a poor man's 458, and cycles much faster for all of us non-overachievers.
gunnie