ive read the definanition and doesn’t tell me much. Does sectional density have anything to do with a projectile easily mushrooming on game? What I mean is should a lower SD be used on a whitetail and a higher SD on say a moose? Reason why I’m asking is I want to slow down a 300 saum load for whitetail deer for proper expansion so I thought maybe I should go with a heavier projectile. Would my heavier projectile have trouble expanding ? Does sectional density have anything to do with that? Thanks guys!