Distance P2P more than 300M

i really love this forum.
This is my second post in these 2 weeks…

What distance we could expect with these settings in urban area

radio frequency: 915 MHz
spreading factor: 6
bandwidth: 500 kHz
coding rate: 4:5
preamble length: 10
TX power: 22

We measure 300m, well it seems good, but we search for at least 1 km.
We use Rak flex antenna currently, but ordered 2 big antennas.

Check out this interesting article The Best LoRa Settings for Range and Reliability

You can test with different BW, SF and CR.