like Buff and Brent i would prefer 50lbs at your draw but you can shoot 44lbs if you have to no problems, if the shoulders not good and you dont want to risk it ( however a bit of exercise and stretching may do it good?) then dont risk it, but if you decide to stick with 44lbs MAKE ABSOLUTELY SURE YOUR BOW AND ARROW SET-UP IS TUNED PERFECTLY, don't amuse it is make sure it is! would be my advise, some proper tuning will go a long way and with 44lbs good shot placement, discipline in waiting for and taking the right shot you could kill every African plains games animal.
personally i shoot 60lbs with 700gr arrows
where are you going i likely know the area?