i shoot a 285 grain arrow out of my xi at 52 #and a 289.4 grain arrow out of my 60#guardian,at fifty yards you will still have total pass thru on a white tail,my buddy that guides up in alaska shoots a guardian as well and shoots 300 grain arrows out of his,he told me no reason to go heavy,if300 grain will take out a brown bear it will take out any other animal in north america.