Download Speed is just under 300Mbps for a 1GB Connection

Hi,

I Started with the 100Mb services several years back and have upgraded over the years and when i upgraded to 500Mbps I believe I was getting around 300Mbps but I have since upgraded to 500 and then to 1GB but my download has stayed at 300Mbps still. 

I use my Hub5 in modem mode connected to a Draytek 2860 and I run all the test wired directly to the Draytek router.

Can anyone please help on how to get the full speed or at least very close enough.

Thanks in advance.