Re: .44 Mag for Deer...Best Factory Load ?
Go get the Honrnady XTP ammo. Shoots great out of every gun I've seen it in and is great on deer. My mom had trouble the first few years she had her Ruger 77/44. She would hit them and not get any blood trail. We found hair, and one I found dead two days later 150yrds away with a double lung. Now that she switched Stevie Wonder could find them after she shoots.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.