RE: recoil question
I shoot a 50 Cal ML with 100-120 Grains Pyrodex and have all 3 you listed in my cabinet. I have a bad shooting shoulder which has made me become recoil aware and I have no problem sitting down for a good range session with the 50 cal and the 7 Rem Mag, with no after effects. IMO a ML recoil is more like a push then a jolt, I find my 7 Rem Mag to hit me a bit harder & stiffer than the ML with 120 grains of powder, however Like I said it doesn' t bother me any.
You should be ok with any of the cartridges you mentioned.