Maybe something to make it just a touch less random? Similar to the counting of Dealer's Choice, I mean; "4 live, 2 blank" or something like that. Could add more tension too :3
I said this in an earlier comment, but I didn't want to use the Buckshot Roulette chamber mechanic bc 1. It felt off to use on what is essentially a pump gun and 2. lore(said pump gun doesn't work most of the time).