1 73 calories per ounce or 28 g of sirloin steak lean and fat (1/8 rim of fat). 2  268 calories in a 4 oz or 114g sirloin steak (lean only). 3  402 calories in a 6 oz or 171g sirloin steak (lean only). 4  536 calories in an 8 oz or 227g sirloin steak (lean only).
Double muscling- A genetic trait in cattle where muscles are greatly enlarged rather than duplicate muscles. Double-muscled cattle...
A cow-calf operation is a method of raising beef cattle in which a permanent herd of cows is kept by a farmer or rancher to produce calves for later sale. Cow-calf operations are one of the key aspects of the beef industry in the United States and many other countries. In the British Isles, a cow-calf operation may be known as a single-suckler herd. The goal of a cow-calf operation is to produce young beef cattle, which are usually sold. A rancher who works within such a model is often called a cow-calf operator in the United States.