Porcupines: how do I bait a nuisance porcupine and what caliber?

The .22 should take it down but, if you want to take him down and make sure it won't live a 12 ga slug will take him out the 700 should work to. But the .22 doesn't always work I shot a cat with a .17 HMR which is more powerful than a .22 and it's still alive and it's been weeks sence I shot it.