I've shot hogs with recurves and longbows from 50 to 65 pounds. I killed 19 hogs this past year and was also involved in trailing 15 more for my brother (he's a compound shooter). We hunt in low, muddy, often flooded swamps with cutdowns and cane breaks so thick that most of our trailing is done on our knees. A good blood trail is very important. We've used Steelforce, Buckpole Patriot 2 and 4 Bld, Zwickey Eskimo 2 and 4 Bld, Zwickey Eskelite 2 and 4 blade, Magnus II 2 and 4 Bld, Snuffers, Wensel Woodsman, Grizzly and Ribtek. Most of my hogs were shot with a Black Widow MA II 56#s at 29" with 540 to 550 grain arrows. Six were shot with a Black Widow MA II 65#s at 29" with 610 grain arrows. I've had some poor results with penetration with both Snuffers and the Woodsman. Even with the 65# bow. I dub the tip on these heads. Even though penetration wasn't great, the blood trails were pretty good. That said, I've had great penetration with Grizzley's and the other two blade heads but the blood trails for the most part were lacking. The slit they leave seems to close easily due to fat and that thick (often muddy) skin around the sheild. I do like to try different designs and configurations but I always find myself coming back to one broadhead, the 4 blade Zwickey Eskimo. I like 4 blade heads in general, especially those with smaller bleeders, but the Zwickey is my favorite. I practice and shoot 99 percent of the time with broadheads. Since the Zwickey's are all one piece, I don't have to worry about losing the bleeders in targets. The small bleeders don't seem to impede penetration but really help to open up the hole. These heads are a little more difficult to sharpen than a removable bleeder style. I also like the looks of the muzzy phantom and the magnus stinger 4 bld but I've never tried them.
Shot placement (as many of you have said) seems to be the most important factor no matter what head you use. Stay tight to the front leg and low, slightly quartered away if possible. Hogs that are hit right, go down pretty quick. If you hit high or a little far back, you might want to bring some extra flashlight batteries and/or a dog.
Turpentine