I'm an alligator outfitter in Florida.
www.deepsouthoutfitter.com My clients use my crossbow and I never use anything but muzzy's #600 cord. I have used the #300 before and lost gators in the hydrilla and had it break one time when it wrapped around the gator. Big gators do all kinds of crazy stuff so use the best you can get everytime. I book 30 hunters during the season and everyone loves it, it' s awesome.
Good luck,
Billy