Own a M82 reload 50BMG. With limited access to shoot BMG prefer to shoot Factory (hunting ammo) Amax get some a OGC. Waste less ammo & time to rezero.
Resizing and priming 50 BMG isn't fun. BMG is one of the few cartridges I prefer not to reload. Used to only get 29 reloads to a pound of powder. Lol
So buying loaded ball is cheap and spend my time reloading other fun calibers i.e. 375 H&H or 454 casull (rifle and handgun) favorites.
If you do want to seriously reload BMG, MHO spend your money on best press and primer seater you can buy.
You won't regret it. Have fun.. Shooting BMG is a blast...