Brand new 300bat air bottle has leaky bleed valve.

[angrybear]

Hi Angrybear, no, haven’t checked exactly where on the bleed valve the air comes from. I’m in touch with the retailer for an exchange. This time, I’ll check the replacement works on receipt.

Better still get them to test it before dispatching it, do you have a 300bar steel/brass blanking plug ?
if not they're handy to have, take it when get a fill & you can test on site to see what the fill is.