I guess the question is how much you plan to shoot, followed by whether you get decent brass to begin with.
I shoot my 50s LOTS!! Got a bunch of brass that I would suspect was fired from a well worn Ma Duece, the cases were significantly swelled just ahead of the web.
I had a Lee kit and broke the press neatly in 2 trying to size these cases.
I pitched the press and that brass. Now I am using an Ammo master, the RCBS dies are not the best I found I needed to take .010 off the bottom of the size die to get proper case length, have since invested in a set of CH dies and like them alot.
My advice by the best you can afford, if you have to skimp on the loading kit, buy new brass 1st time around and you should be fine.
50s seem more forgiving in seating depth, getting close to the lands can be difficult unless you use long bullets like Amaxs.
I have had great success with US869 powder and as it is signifcantly less costly than alternatives I can shoot more.
Long Distance is BETTER than being there