I do hunt with a compound bow, and yes I use my left hand as my draw hand! Same with rifle 😊
Things just get a little... Interesting when setting up knives etc and can look a little strange 
Out of curiosity (only fired a pistol once) can i shoot right handed with a pistol, while using my left eye as my lead?
I wouldn't. Trying to aim with one eye while holding the weapon with the opposite hand requires contorting your shoulder and head in rather uncomfortable angles in order to line the weapon's sights up with your eye. We see Nicholas Cage do just that with his hand in the movie
Firebirds, when his partner asks him to show her how he pointed a gun when playing "Cowboys and Indians" as a kid. He pointed his right hand in line with his left eye, showing that he was left eye dominant, which is a problem when trying to use the weapon systems of an Apache helicopter, given that the targeting reticule on the helmets is always mounted over the right eye, and that was throwing off his targeting in training. It was really awkward though because his arm had to cross his body at an odd angle, and his head had to tilt to the right as well. It's a completely unnatural way to shoot. It's better to just use the hand that corresponds with the dominant eye. Everything just lines up more naturally.
As for knives and other melee weapons, definitely use your dominant hand. Typically, it'll be stronger for striking a blow. It's just ranged weapons that require aiming that really require that you use the hand that corresponds with your dominant eye, even if that would otherwise be your off hand.
