Okay, let me lay it out like this and paint as clear a picture as I possibly can.
The grenades utilized a specific type of Gavrilium, Gavrilium-U. The gavpowder uses powdered gavrilium, unmodified in the design save for the fact that it's added to cordite, to add potency to the propellant. Unmodified powdered gavrilium is going to share some properties with base gavrilium. Caelium, when in the otherwise unmodified powdered form that Abbera made (or the foil that I gave you because it made more sense than powdering a metal in my mind at the time), does exactly what base caelium does - creates lift when power is supplied. You can't just crush something and expect it's properties to completely change. Or perhaps you meant to use Gavrilium-U, which would end up requiring barrels being swabbed like old-school cannons to get the gavrilium shit cleaned out. Admittedly I also didn't think of the effects on the GGG and LGG due to sharing the motors, largely as both the GGG, which defined gavpowder, and the GavEngine were created in the same phase and so it took a little bit for me to realize implications.
As I admitted in Discord, in hindsight I should have been more obvious, but suffered from the fact that I knew exactly what I was looking at when I wrote it. As stated, I also mentioned the lack of a complete understanding was in part my fault, and I was going to bring it back up in this combat report to give you and Abbera the chance to find a workaround next turn before youse all met. I also noted specifically that they would not go up in a massive fireball, citing Fallout vehicles as an example, and in fact I haven't actually even said how much of an impact the [VOLATILE] tag would have. Forsaking OpSec for another few moments since I'm still on the fence about continuing this at this point, Abbera created something using their version of a GavEngine that saw combat and also saw destruction. They immediately asked about the potential reaction with the Gavrilium and asked about the results of the destruction, where I specifically described the engine as "slagged", not disintegrated, or nonexistent, or in many tiny fragments scattered across the land, after the thing suffered from an explosion or two.
And so Max knows as well, the GavEngine, GA1, M2, Mountain Suit, Sled, and latest Gravite proposal all rolled a 2 or 3 unmodified for some ungodly reason. My frustration comes in large part from the fact that I've really been trying to help you guys out but as soon as something less than desirable pops up I'm some sort of Satan/Hitler. Understandably and admittedly you guys didn't understand how much of a hand I've been giving you. Still, Abbera has shared many of your experiences and as of this moment has had exactly zero issues. I said from the start that failure and experimentation are key parts of this AR (not a half dozen design failures clumped into four turns though), so it was never my intent to spell everything out. Could I have handled it better? Yes, obviously, I'm still learning. But it's hard to improve when you get brow-beaten for every perceived mistake, because then you start getting frustrated and vindictive and lose the will to put up with it.
So at this point here are the options I see:
We go as is and you revise some way to stabilize Gavrilium
We retroactively switch to using Gavrilium-U, which would cause more problems with your weaponry but keep gavrilium from having any kind of an explosive reaction in it's base form
We continue in some hellish middleground where everything I do is picked apart in detail while my use of your details is forsaken
We decide everything's fucked and end the game
It's up to you guys at this point.