All the hours of playtesting a game might never find all the little things that could trip up a game, especially one with as many parts as Bolt Action. As such, it's good to regularly update things with little tweaks and changes, along with just answering any sorts of questions players might have. That's what we've got here from Warlord Games.
From the website:
We present the latest FAQ for Bolt Action. This PDF is the most up to date source for rulings and replaces any previous documents. (Most recent update January 31 2021).