This is just food for thought.
Have you ever thought of a heavier arrow setup? As an example, I have a 42# recurve bow and all of my shots are 20 yards or less so speed is not important to me. A quiet bow is important to me. With that said, my 42# recurve shoots a very heavy 642 grain arrow which equates to 15.28 grains per pound (GPP) and the bow is very quiet upon arrow release. I practice at 10, 15 and 20 yards. The heavy arrow really wallops my Morrell Yellow Jacket Supreme field point bag target at 20 yards since it penetrates very deeply. In fact, it's destroying my bag target. As an added bonus, there is very little drop in arrow trajectory from 10-20 yards. I've shot the 642 grain arrow through a chronograph and the arrow is traveling at 151 fps. I wouldn't hesitate to shoot a black bear with this poundage and arrow setup combined with a very sharp two blade broadhead.