Hi,
First of it's good to another Female who Hunts, second my Wife is 5'2" and 110 and she also Hunts Turkeys with a ML and uses half the shot you do and only 62gr of 3f.
Next try this and it works because I use it for Bowhunting Turkeys and nothing beats it.
Put your decoy (if you can use one) in the (opposite diretion) the Bird is comming from. Stand behind a tree facing the decoy. When the bird see's the decoy he'll walk right by you and fan out, when he fan's out SHOOT, usually you'll have a CLOSE shot at the bird and his fan will block him from seeing you as he approaches the decoy.
I and My Wife have taken birds at 5yds and closer, and even the smallest load will put him down at that range, so dont worry about the load your using, just out-smart the bird and he's your's.
Best of Luck and Happy Hunting!
Ron (BP)