Interesting concept, and I like your title art! Would have been nice to see an example or two, as it took me a reread to tie together the section about actions in combat with the trigger for rolling bullet dice. And I’d be curious to see how often 1s actually come up in a game once you reach max BD - maybe it’s just me but the d20-d12 jump is pretty big; I’d consider making d12 the max myself! But the core idea that ties the ‘click’ of an empty gun inextricably to the thud of a bullet in your own heart by making them mechanically identical is very cool. I can so clearly see a character sitting behind cover, weighing their last few shots, and, unlike other RPGs (ones that don’t interest themselves with resource management at least), wondering if there’s any way out of this that won’t ask them to fire away their final breath. Nicely done!