It is common to see field dressed deer weigh well over 200 lbs. here. I've seen some up around 250 lbs. That deer would be over 300 lbs. live weight!
I remember back in the mid 80's, my brother shot a deer that two grown men and a teenager could not get strung up in the shed...... so they got the bright idea of throwing a rope over a stout branch on the elm in front of the house, with the other end attached to the hitch on a pick-up and hoist him up that way..... the branch was 4 or 5 inches thick, and they found they needed a stouter branch, the hard way.
Not all the deer are huge, but year and a half old bucks are not something you want to try dragging by yourself...... with the good possibility of a shot at a 300 lb. monster, I have a hard time wrapping my head around the idea that a .223 or .357 out of a carbine is "enough gun for deer". There's a thread right now asking if a .32-20 is enough.......