If the mark is incuse, then it is coin contact that altered that device. A lot of the 1950's wheat cents show extreme die wear and they worked the dies past normal retirement. So there is no extra metal on your coin. The weight pre/after the strike will remain the same. A die chip, crack, break,
Cud, or coin gouges will not increase the weight. 3.11 going in.3.11 going out. Unless something is struck into the coin, then the weight will be the same. (During the strike, the metal is just re-arranged during the strike. Nothing is added by the normal strike)