They've got some pretty big black bears in Canada, so you might consider a heavier bullet for your 45-70 than a 300-grainer. Check out what we offer at
http://www.garrettcartridges.com/products.htm Our 415-grainer at 1850-fps will shoot lengthwise through any black bear, even the heaviest, and will give you all your fine 45-70 can deliver.
Good hunting, Randy Garrett
www.garrettcartridges.com