I have hunted for years with rifles that have set triggers, mostly rabbits, foxes and kangaroos, half cock and unset, only cock and set when about to engage the target. If the opportunity is missed and no shot, I put my hand over the cock in such a manner that allows me to then trigger it and then re set the cock back to the half bent that is for the cap lock, for the flintlocks I first flip the frizzed forward then do the same with the cock, careful as the flint is sharp and also you can check the priming. I have 1 rifle that only fires with the set trigger having been set, that is a bit painful as the other two rifles can be shot with the choice of either set or unset. As Bob R suggests adrenaline can be an issue, it that be the case I go unset. I have an english ball rifle with a crisp 11 pound pull this rifle was likely used for tiger and the like in British India, I am guessing the heavy pull was to counter nervous trigger fingers !