The standart reticle is quite clean by itslef but it is very cluttered on late tanks equiped with APFSDS rounds that have almost no fall off because 200 meters increments are too short.
You can build your own gunsights in the game, for your use case i’m guessing you want something like the reticle preset " cross with a range scale " perhaps.
Yes, I am suggesting to add the standart reticle with 400 meters increments into this Sight Settings as a template.
It only has default with increments every 200 meters.