I've noticed, both here and at the zoo, that colubrids usually are easier to feed in the enclosure. The best thing you can do is to start feeding him in his cage, leave him be for those next two days, then try handling him. Is he striking only when you reach for him or even when you already have him held??
If it's only when reaching, then it's a reaction to the hand coming down for him. In that case, obstruct his view by placing his hide (or something similar) in front of his face/over his head then stroke his back a bit before picking him up. I've found that works wonders with my corns when they're a bit jumpy.
If he strikes all the time, whether you're holding him or not... then I'm at a loss. I guess you could just try the gentleness method for a while and see if he chills out... Good luck either way.