When deer hunting, I load before getting into the woods and then cap after I'm at my stand. I do set my hawken on the half cock, but one must be very careful. DO NOT lower the hammer onto the cap. a bump on the hammer or a slip of your thumb will be enough to set it off. I have walked through the woods trailing game with mine on half cock, as that is the only way to keep it ready to fire, BUT one must remember and practice ALL the safe handling rules and make sure where your barrel is pointing and finger off the trigger.
When I use my flintlock, I also have to put it on half cock after priming the flash pan. Same rules apply.
hope this helps.
My biggest advice is to get to know the gun and it's quirks, with it unloaded, try a few things on halfcock before you hit the woods. With it unloaded, walk around the house, or if in a rural area outside and bump it around to see if it will hold. toss it on the bed, hit it butt first on a carpeted floor, etc. you'll soon see if the halfcock is strong or not.