For medium 45-70 loads the Lee load hand kit may be fine. Shoot for a mid range powder charge and the hand dipper will be within a couple grains. Not winning matches but fine for hunting, just make sure you are targeting at least 3-4 grains under max.
As for COL use bullet with crimp groove and eyeball seating there.
Hand press and classic caliber kit both for less than $100, add powder bullets and primers for another $50 get 100 rds of ammo.
But Yes- a powder scale and calipers are very much recommended.
Could go with the Lee Challenger kit, single stage that you can load just about anything on. If you go with the Lee wack-a-mole, you can only load that 1 caliber and are half way to the cost of a Challenger.
I cast my own boolits and shoot a 405 grain (actual weight 416grains) with 34 grains of RL7, which is on the low end of the load data and it gets around the velocity you are wanting and is pleasant to shoot. You can also find load data on the Alliant webpage. I have a single shot Handi in 45-70 and it is quite accurate, I have never tried my load in a lever gun though.
I use a 45-70 often and have been loading for them for over 30 yrs. They are great guns. I recommend the lee single stage loader. It makes the process much easier and you can expand your reloading needs and you go. A scale is a must if you are loading for a lever gun. I like the Sierra 300 gr bullets. I use the sierra reloading manuel. My favorite load is 48 gr. of IMR 4198