Config file decimal places read by game when in 'read only'

[jabbothehut]

Just a quick question.

In certain game config files there is a limitation to how many decimal places a sensitivity multiplier can have. Adding more causes the game to round up or down and modify the config file. 

However if one was to add more decimal places and make the file 'read only' would it then proceed to read the whole value or would the game still round up/down?

Any help would be very appreciated.