You could cut his head off if you were precise with the cut. Just cut inbetween the vertabrae in the neck. And i don't think adamantium bullets would kill wolvie because the material the bullet is made of is only 1/2 the problem. The other problem is finding a gun that could shoot a bullet out of it's chamber fast enough to cause signifigant damage. I always wondered why it took like 300 xmen comics for magneto to come to the realization that he could just rip the adamantium outta wolvies body. And i agree with whoever said rip his heart out by entering through the abdomen, not only do i think it would work, but it would be the best killing ever (sorry william wallace)
OMG kes...didn't knew you from this side.... HELLO MATE!!!!! shesh, i'm starting to love this girl! HEHEHEHEHEHE why not.... tie him to the ground in the zoo and make an elephant sit on him? or...uhm...make him listen to britney spears and wear a pink dress or sth... he would have a heart attack haha.ha. (ok i'll shut up now 😄)