What are my chances of a 1450+ SAT Score?

Okay, so my goal for the SAT is a 1400-1450+ as a junior (first time) and hopefully higher for the school day SAT. I will be taking the SAT in August 2018 and will be studying thoroughly through the online PREP class and College Board Prep Book 2018 for the summer as well monthly modules and diagnostics prior to summer. My PSAT 10 score was a 1230. I am currently a sophomore and my goal is Georgetown University and its SAT scores range from 1320 to 1550. Is it feasible for me to get a 1450+ on the SAT in August and what would be more realistic?