19's info wanted

[SeekHer]

I want to build a .19 but I don't know which one to choose...Badger, Calhoon or 223...

Which is the better cartridge for ease of reloading? Fireforming?

What effective--not maximum--ranges would I expect from each?

Is one rifle easier to convert then another into these calibers? Gunsmith costs and base rifle price?

I am leaning, sorta, kinda like to the Badger. Don't know why? Do you? Should I be?

Thanks in advance for any input in solving this stay awake at night ponderer!