So after trying out Mr. Crayfish's Gun Mod, I decided to take another step and try to use them in the nether and the end dimensions. But what I have stumbled upon may be a massive bug. When I attempted to use my bazooka in the nether, for some reason the projectile didn't explode. I shot another rocket. Then the animation for the first rocket decided to loop over and over constantly. After 5 seconds the rocket finally exploded. I tested this in the End too, and what do ya know? Same issue. The animation showed a rocket no-clipping through an obsidian pillar in the end. Also when I shoot the dragon it causes some lag in game.

I can't seem to reproduce. Feel free to open a new issue if still a problem on the latest version of the mod.

Problem did not occur on my end.