e.g I made a rocket that actually moves, explodes on impact, and uses SNOW(C-4) as a fuel. It uses ICE(SING) as an explosive
When it comes to bombs, they are very simple to make, so you can use the idea of PLUT and NBLE to make pressure. Also, just to say, I didn't downvote, but bombs don't always get many upvotes in TPT, unless they are very unique or are made in a new way.
My first H-bomb that i made under an hour ago has kinda the same bad results as your first bomb, but i dont want to copy you with that noble gas to get pressure. Btw could you remove the walls?