in my two trip`s (2006/2009) i used my 55# saII widow , 1st trip kudu bull 140gn magnus 2 blade 540gn arrow ( cx heratage carbon ) 2nd trip 2 kudu cow`s same bow 150gn woodsman 530gn arrow`s (cx edge hunter`s ..skinny ) pass through`s each time , had an eland bull at 12 yards but held off , then my ph said i would`ve knocked it over .
your good to go & then some !!
good hunting .
john