I'm insulted you think so. [He isn't, and he does a terrible job of pretending to be. It's a little uncomfortable, though, thinking about Strange having one of those weapons, and Rocket is absolutely jealous that he and Shura have them but Rocket didn't get one. The universe is a dick.]

I think the fuse is more the problem than the powder. The pistol doesn't even have one. The bullets, the ammo for it, they've got this little metal bang button pin that the pistol slams into the powder in the metal case, and the powder ignites and slams off the solid metal head. [In the case of those bullets, it had been a hardened silver tip.] But I tried packing the powder into the back of a metal tip like the bullets and I can't get the crossbow to ignite it, so it hits, but it just acts more or less the same as usual.

[He could maybe replace the fuse with a metal rod, but he doesn't yet have the knowledge of how to progress from that to actually sparking it.]

If I can just ignite it directly I shouldn't need to even worry about that, but then the bolt launches the arrow head too soon. I need a delay.

[He's as much of a nerd as Strange, though Rocket would vehemently deny it. Weapons were his dragons.]