No doubt... .44mag is quite the powerful performer.
The old .45-70 I had was black bear killer too; the gentleman I purchased it from took several with it over the years.
Now... .45-70... I always wanted a Trapdoor Springfield in .45-70. Even a repro would be nice, but the price is not attractive. Pedersoli makes/ made some fine repros some years back, but they were like 800 bucks. Too much..