Credit Scores and Mortgage Rates

[JesseJ]

Okay. So I know from content like this (https://www.washingtonpost.com/news/get-there/wp/2016/11/17/heres-how-much-your-credit-score-affects...) that the higher my score is, the better my mortgage rate will potentially be. Cool. Makes sense. 

But if I'm at a 760 credit score (as reported by TransUnion), and wanted to quickly push my score to an 800: 

1. Is it even possible? By "quickly" I mean, within the next two months or so 

2. Will it, at this tier, make much of a difference to the mortgage rate available to me? 

I'm sure we could have a broader conversation about down payments, and 15 vs. 30 year loans, and all that jazz, but for the sake of keeping it narrow, can we just focus on the above Team?