KEEP THE HOLLOW POINT!
n10sivern
I am a fan of HPs cast soft for hunting.....they kill quicker. I have been using them for years on game. I have used them from 800 fps to 2200 fps. The one thing I have found is the alloy and HP shape (width AND depth) must be matched to the intended impact velocity range on the hunted game.
You've a large heavy bullet smashing into dense meat and bone on those shots (good shots btw) and there shout have been damage like that....that's what disables and kills quickly. You haven't yet mentioned the depth of the HP(?) but it is important. With that heavy bullet at subsonic velocity cast of that soft alloy a shallower HP is probably warranted for a bit less violent expansion.