Sorry but I didn't see any magic bullets in that list that will miss your cat, kill the raccoon and not leave blood on the concrete. Did see a lot of them that will ricochet nicely off concrete and go places you probably don't want them to.
Clean up the mess, bring the food inside and the raccoon will have no reason to be messing up your porch. The only alternative is to teach the cat to duck and buy rubber bullets that will disintegrate on concrete but will penetrate the coon and seal the hole behind it. I'm not sure where a bullet like that can be found so go with the clean up, it will be cheaper.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.