Though most ammunition will perform with the BullPup9, Bond Arms acknowledges that uncrimped ammo, for example rounds produced by Blazer, possibility being pulled apart while in the journal, given that the pull force inside the chambering system can yank the casing and bullet aside, spilling gun powder in the journal https://redgearguru.com/learn-how-to-pin-a-collapsible-stock-on-a-rifle/