The minie is a combat projectile. While it is very effective on critters too, their heavy weight and velocity limitations and resulting mortar like trajectories, make them an extreme challenge.
There are things like the Hornady Great Plains bullets. Hollow base, but nowhere near minie type. They are very well thought of.
I've never had leading with minies, or any other full caliber lead bullet. Lube is critical. Many formulas out there, but lately I've had good luck with SPG.
Critical to minie success is:
Good casts. Not the easiest to achieve due to the 3 piece mold.
Ideally .001, but not more than .002 under bore diameter for best accuracy
Good lube.
Unless designed for heavy charges, keep it under 80 of 2f or 70 of 3. The skirt can separate in the bore ( called a lunette) or wind up looking like a badminton birdy.
Most minies are .577 or .58. I'm going to try a Lee 500-360 in my 50 calibers.
With all the challenges, I must say I really do like the minie ball. 20 years as a reenactor and casting/ shooting them from my Enfield, got 4 Yankee deer too, gives me a certain fondness...