I have two 44 mags...and they both keep Speer 240grainers in the cylinder. I also practice with 240gr rounds. So, for my purposes, the 240gr is great. It really all depends on what you intend to do with the round as to what bullet size would be your favorite.
G32 -- TOP GUNS *.357SIG* Club #77 & .40 S&W Club # 512
Smith & Wesson M629 Trail Boss / Ruger Super Blackhawk 44mag
12g 870Express loaded with PDX12s
Winchester 30-30 lever