Mmm, yes, thanks to hamburgers...
300 nm sounds a bit too short to make any use of jet propulsion, or fanjet rather. A turboprop would do better in terms of economy while matching the flight time and even a piston wouldn't lag far behind in terms of overall flight time and economy would be miles better.
I really don't see the benefits of minijets except as marketing BS. It seems many in the general public believe anything with props on it is a small and dangerous contraption, whereas the word JET makes everyone feel safe regardless what tin can you strap them to. It's a bit odd.
On longer flights I'll agree they provide real value, but short hops don't make any sense.