The best 45-70 round I think is the Win Partition [300 Nosler Partition] ,you'll get penetration and expansion !!.I've heard the Hornady expands too quickly.
Slugs only for the 12 ga.Remember you have to get into the vitals .Have you ever seen a 400 lb bear at close range ? I have at 15' they're BIG .I was ignored as usual as it was not hunting season and he had his GF along !
