I have my model 3 since June 2023, always charge up to 80-85% and only use super chargers because i don't have a way to charge at home and i have one charging station 2 min away.

Today, while charging I tried to set ir to 100% just see what range would give me when finished and showed "limit: 298 miles".

Isn't this on the low side? Looking at the specs it should have 315 miles range. Is this normal values or should I be worried? Specially because it still has very low mileage.

The car never stays long times idle, I drive it daily. The only time was during christmas holidays, about 3 weeks at around 75% because i was travelling on vacations.