Read the 4th paragraph here, regarding BlackJack Bullets demise and Sierra's involvement... - that was April 4th, 2022. As a small business, it's kinda hard to keep rolling when you can't deliver any product. Now... Sierra is only part of the problem (a big part, but not the whole story) in BlackJack's death. Based on the fact that around this time the owner also stopped returning phone calls, and won't refund money for any outstanding orders, it seems probable that he didn't have the money to pay for an order in the April 4th timeline even if the bullets didn't show up (ie, he spent his Accounts Payable trying to stay afloat in that year waiting on bullets).
I traded a message with them (well, with the social media guy, who later quit in the post above) on May 21, 2021 - at that point, Sierra was about two months overdue on their order promise date, but was telling Blackjack that the order got bumped due to "gigantic military contracts". On Jan 17, 2022, I pinged BlackJack about a rumor floating around that Tubb was also getting screwed by Sierra (because I was concerned about *my* backorder with BlackJack, and wanted to gauge where it might be at at the same time) - they responded "I heard today he should have them in March but that’s just a rumor too. The only certainty is with demand this high things are volatile. The biggest contracts win out." BlackJack folded 3 months later.
I don't have any other data on Tubb than the above.