Punk for metalheads: what heavier stuff would you recommend?

Hey there,

I'm a metalhead who has also always been into punk rock, hardcore, crossover, and some crusty stuff.

Lately though I have got an itch that I can't quite scratch for something heavy in the sense of big chuggy guitars, big drums and so on. Early Bokassa is a good example (I love everything until Divide and Conquer).

Any recommendations?

Cheers!

EDIT I'm very familiar with thrash, crossover thrash, and grindcore :)