Raw v Cooked 20% Ground/Mince Beef

Hi,

I'm confused about the most accurate way to log my ground/mince beef.

For example if I log 600g of Irish 20% beef mince I get a total calorie count of 1841. 600g is the raw weight.

After cooking the 600g of raw mince it now weighs 390g. I then found a listing for _Beef, Ground, 80% Lean Meat, 20% fat, Patty, Cooked, Pan-Broiled _- which gives a calorie count of 959.4

Can anyone tell me the correct way it should be logged for accuracy please?

Thank you.
Anne