I have a 45/70 that loves Winchester 300gr HPs.
It is scoped and shoots quite well out to about 300yds or so.
That is as far as I have tried it.
I also have one in 405.
Havn't really shot it much.
Lastly I have one in 270wsm and it is awlsome out to a tad over 500yds.
At 300 it drops about 3" to 4" with a 1.5" high 100yd zero.
At 500 it drops about 14" to 16".
Makes hold over at long range fairly easy.
The 270 loves the Winchester 130gr silver tip ballistic tip ammo the best.
LONGTOM