Hollows man, go for expansion.
First three comments practically settle it . . . I only asked (on his behalf) because there appears to be some “controversy” when I did the research (on his behalf).
JHP expansion dissipates more kinetic energy...
... with more damaging terminal ballistics...
THINK-->>> ...the projectile STOPS!
FMJ may well go through-n-through --
May keep going a good distance with penetrating energy...
THINK: possible collateral damage/bystander injury... etc.
Just my $.02