A chuck roast is best braised and not oven roasted. Its relatively tough and fatty so it's perfect for a long, slow moist cook.
It's my go to for pot roast.
Look up some pot roast recipes. Or cut up the roast and make a yummy stew.
If you oven roast I'd go a minimum of 250 degrees.
Less is not more. More is more and more is fabulous.