My how man and time has fictionally altered historic realities.
I bet several nations of American Indians would've given a left testicle to have that 610gr arrow VS tying obsidian points on dogwood shafts but to answer your question?...
"POWER"...close quarters..."POWER".
I'm going to be on the ground and a short ways away from some rather large hogs and light arrows off a 42# Longbow just doesn't give me a warm fuzzy but with what I'm fixing to put on the front of these stix?...I ain't real worried about running into anything this continent has to offer and that's saying a lot for a 42# Longbow rig. ;)
Last week it was a 300 grain arrow and speed, this week it's a 610 grain arrow and POWER. And now you're confident on Bison or Grizzlies with 42lbs? Run whatever you want out of that bow because you know it will never make it out of the backyard.