I made an attempt at accounting for stoichiometry and oxidizer density in the fluorine/hydrogen mix and developed a CLGG that made use of it. The payload and projectile are nickel chromium iron since the material is resistant against attack by the yielded hydrogen fluoride. Overall performance is promising, but the primary weakness is that assuming that the gas mix is a powder/granulated solid propellant makes large bores, and thus larger, more vulnerable turrets a necessity.
Overall, if we could get an editor coded with the correct equations of state for such a gun I'd be willing to argue that this could be a much better alternative to lower-power coilguns for propelling heavier projectiles at higher velocities.
Data\Materials\Combustables.txt Material Fluorine Hydrogen Gas Mix Elements F H ElementCount 2 2 Density_kg__m3 1.814 EnthalpyOfFormation_kJ__mol -273.3 SpecificHeat_J__kg_K 7970.86 MeltingPoint_K 14.01 BoilingPoint_K 20.28 ThermalConductivity_W__m_K .067205 RefractiveIndex Hydrogen RoughnessCoefficient .9
For those interested in CLGG technology, Utron the company who was developing this put out a paper with the equations and testing results from their 45mm experiments here. Its rather interesting since this was being pitched as an alternative to the ERGM which acheived longer-range artillery support via a 127mm cannon-launched rocket-propelled projectile guided via GPS.