I used the current Hill head side by side with my modified Grizzlys this year. They both are close to the same overall profile and fly exactly the same from my longbow. Both the Sharpened Hill head and a modified Grizzly weigh somewhere in the 175grain weight range +/-. The Hill blade is as tough as ever, but the new ferrule/pin is most definitely a weak link. The ferrule is die cast from pot metal and the pin is soft. A hard hit will dislodge the pin. Also, anything such as hair, debris, grislte, fat, etc. that can find its way between the blade and ferrule will wedge the ferrule so it splays open and it will dislodge the pin or will break.
http://***********.bowsite.com/TF/lw/thread2.cfm?threadid=181053&category=88#2280614