I would contemplate this first.....vmaxs are a bit longer than the sp.....do you wish to keep case pressures the same? If not and you're only concerned about oal in relation to lands, then you're fine. My 50 spsx is real short for a 50gr. (.595) I'm loading them at 2.155 oal. Keeping a nosler standard .2" of bullet in the case. If I swapped to a longer bullet, the length would likely increase as well. I'm working at case pressures more than distance to lands with 50gr anyway. Just a thought.........should amend to include that it's the standard for bullets of similar length.