RE: which broadheads??
After 35 years of bowhunting, using many different kinds of broadheads I've draw some conclusions. There is no magical broadhead. If the blades are as sharp as can be, the arrow is tuned for optimum flight, and the shot is placed in the vitals they almost all produce the same results.
True, bigger cut means a bigger hole, but it's only useful if you shoot enough kinetic energy to punch through. And this is not an endorsement for turning up the bow weight till you can't handle it. Accuracy is the key.
Assuming a good shot the next step is following through with a little bit of woodsmanship, called tracking ability. This is something learned over time with great patience. With a well placed shot tracking is usually pretty short, but understand that many deer don't shed a drop of blood for 20 yards or more after the shot. Paying attention to details helps. How did the animal react---often gives a hint as to where the hit was.Be quiet and listen. You may hear it go down or fall. Which way did the animal go?------I use a compass as things often look very different on the ground than from an elevated position. Patience!!!!!!!! Go slow and look ahead. Mark the last blood with toilet tissue and look back once in a while. It'll give you a trail, too. When all else fails spend hours on your hands and knees if necessary. There is a lot to it. This is just some. Every siuation can be different.
It's been mentioned and is a given. Stay away from the bone (shoulder). Broadheads are not bullets. They do not kill by shock, no matter how much KE is involved.