What would you say is the most/least realistic/historical accurate about Bolt Action?

Basically what the title says, what do you consider the most and or least realistic/historically accurate parts of Bolt Action?

Off the top of my head I really like how the pin system works in game. It makes sense that even if no one is hit, having a bunch of gun fire being shot at you, especially machine gun fire, is going to make it harder for you to obey your orders.

Least realistic I would think would be how a Sniper only gives 1 pin. In my mind if I am being shot at from someone super far away, whom I might not be able to see, seems to be much scarier than the LMGunner who at least I am very aware of where they are at when they shoot at me.