Personally i prefer a 45cal even if its only a BH209 rig. I have one 50cal i love and only because its a total custom build.

A 45cal will do anything a 50cal can do except shoot a 50cal conical. Ive shot many sabotless rounds with BH209 in my 45s using the same bullets you would use in sabots with a 50cal.

Barrel heat is hardly an issue with sabotless and FPS is greater with the same amount of powder vs the 50cal and sabots. Its a win win situation.