Another complication is that what is called an "8 oz" steak typically refers to the raw weight, whereas its cooked weight will only be 6-7 oz and most logging tools use cooked weights (but some contain data for both and let you choose). A typical "6 oz" filet mignon actually weighs ~5 oz after broiling. And a "4 oz" burger or chicken breast actually weighs about 3 oz cooked.

The standard rule of thumb that 1 oz of meat/poultry/fish has 7 g of protein is for 1 oz cooked.