Gosh ... I'm kinda' LARGE , my fistmele is 7" But I'm shooting 66"-72' longbows of hickory backed red cedar...with a 29-30" DRAW LENGTH... Made 64 bows now ,all kinds , mostly selfbows... 23 broke , about 5 shoot really well, the rest are OK , learned alot , especially how a too low brace height leaves a nasty ,painfull bruises on your inner forearm ...
If the bow is the correct length for your draw, and tillered correctly , it should survive a comfortable brace height...and shoot better /more accurately to boot .