If your advance is going well, you are walking into an ambush. The quartermaster has only two sizes, too large and too small. Never worry about the bullet with your name on it. Instead, worry about shrapnel addressed to 'occupant'. All battles are fought uphill and in the rain.
Tracers work both ways.
If the enemy is in range, so are you. It isn't necessary to be an idiot to be a senior officer, but it sure helps. Your equipment was made by the lowest bidder.