no rangefinder, and hit 12"x24" man torso, at 300-400 yds, using traditional ammo in a lever action or spld Trapdoor, iron sights, 10 shots, varied ranges, elevations and conditions, even HALF of the time.
u "think" 45-70 a long range round, in its traditional format, u r fos. The scoped 10" 223 will do THAT well, EASILY.