RE: Need new gun to replace 270 "help"
Striper,
The problem with the 45-70 is the factory loadings are pretty weak,for the modern 45-70.If you reload you can make some pretty stout 45-70 loads that would be perfect for the jungles of Oregan.
You can get the 45-70 in a great rifle called the Marlin Guide gun,18 1/2 in barrel,5shot,or you can get a 450 marlin,basicaly it just a souped up 45-70 straight from the factory.
As for your caliber power line,just look up the Federal ammo site,or winchester,or remington.They will show you all the balistics for cartriges in question.
If I was looking for one gun to take everything from deer to elk I would go with a meidium bore like a .284 or 30 cal rife.It's hard to beat a 30-06,280 rem or 7mm Rem Mag.,if you like to have a BIG gun in your cabinet take a look at the .338 win mag.
BBJ