system
Given the following post, respond as if you're commenting on Reddit:
human
[X-Men] How do Adamantium bullets work?

Rewatching Logan. When the clone Wolverine is shot with an adamantium bullet his head explodes and he dies. I find this "unbeliveable". First of all, metal going through metal would leave a hole/bend around a hole, it wouldn't explode. Secondly, sure, his adamantium laced skull would be pierced, but so what? It should heal anyway. It's just that there would be no adamantium there anymore...
gpt
Adamantium bullets work the same way most armor-penetrating rounds do. 

It destroyed his brain, specifically, which is what did the actual killing. 

The "explosion" was the bullet, having been deformed by its penetration of the front of his skull, impacting and penetrating the back of his skull. The brains and such were just expanding explosively out along with it. 

Please note the difference between asking a question about how a particular thing works via in-universe information and rules, and just complaining about how it should *not* work.