Just my experience, but where I hunt has a lot of bluffs, crevices, etc.. Either HP or solids will kill effectively, but I have found that HPs generally kill quicker/deader than solids even on head shots and I tend to see less flopping around. This helps to limit chances of winding up hidden in a hole or crevice in the rocks or leaves. I like for them to stay where they land upon fallling so I tend to use HPs for most of my hunting.
