My first guess was 825/1000! Took me another 26 guesses of getting absolutely nowhere, so I took a hint which was - for once - quite useful, as I got the secret word on my next guess!
I solved Semantle #247 in 29 guesses. My first guess had a similarity of 30.96 (825/1000). My penultimate guess had a similarity of 32.06 (868/1000). semantle.com/
That will bring my average back down a little bit.