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...
The following fact sheet was developed to respond to questions commonly asked by American Angus Association members. Additional information may be found online at www.angus.org. What is Myostatin nt821 gene deletion (M1)? M1 was recognized as a strain of double muscling on June 20, 2011. Animals are extremely heavily muscled in appearance,