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Angus Sirloin Whole 6kg - SB 2+

12% off
$265.00 $300.00

The Diamantina Angus Whole Sirloin is a premium 6kg cut celebrated for its firm texture, rich beefy flavour, and versatility. Sourced from our trusted Diamantina Angus program and graded BB 2, this sirloin offers a beautiful balance of tenderness and flavour – ideal for slicing into steaks or roasting whole. It's an excellent choice for home entertainers, large families, or anyone looking to stock up with a value-packed cut.

Pickup available at Peter Augustus Store Camp Hill

Usually ready in 24 hours


A Crowd Favourite with Classic Appeal

Versatile, flavourful, and built to feed a crowd.

The Diamantina Angus Whole Sirloin is a premium large-format cut, weighing approximately 6kg and known for its firm texture, rich beefy flavour, and excellent versatility. Sourced from the trusted Diamantina Angus program and graded at Marble Score 2, this sirloin offers a balanced eating experience with light marbling and strong, traditional beef character.

Ideal for slicing into steaks or roasting whole, this cut is perfect for home entertainers, large families, or anyone looking for a value-driven way to enjoy premium Australian beef.

Why Choose Diamantina Angus?

  • 100% Australian Angus beef, raised naturally
  • Marble Score 2 for balanced flavour and tenderness
  • Full-bodied, beef-forward flavour
  • Versatile for both steaks and roasting
  • Excellent value for bulk cooking and entertaining

Perfect For

  • Cutting into steaks for BBQ or pan cooking
  • Roasting whole for a classic centrepiece
  • Dinner parties and large gatherings
  • Bulk meal prep and portioning
  • Customising steak thickness to your preference

Product Highlights

  • Approx. 6kg whole sirloin (boneless)
  • 100% Australian Diamantina Angus beef
  • Marble Score 2 – light marbling with full flavour
  • Ideal for steaks, roasts, or slicing to size
  • Vacuum sealed and delivered chilled

Cooking Inspiration

Slice into steaks and cook over high heat for a rich crust and juicy centre, or roast whole at 160°C until your desired doneness is reached.
Rest well before slicing to retain juices and maximise tenderness.
Serve with classic sides such as roasted vegetables, sauces, or fresh salads for a complete meal.

The Peter Augustus Promise

Every Diamantina Angus sirloin is carefully selected to deliver consistency, flavour, and quality. Whether you're cooking for a small group or a full table, this cut is designed to perform and impress.

Storage & Delivery

  • Delivered chilled and vacuum sealed for freshness
  • Store refrigerated at 0–4°C
  • Freeze on arrival if not using within recommended timeframe

Frequently Asked Questions

Meat Quality & Colour

What is vacuum sealing and how does it extend shelf life?

Vacuum sealing removes air from the packaging, slowing oxidation and bacterial growth to extend freshness and shelf life. When stored correctly at 0–4°C, you can expect the following guide:

  • Beef primals & whole cuts: up to 28 days
  • Beef (steaks): up to 21 days
  • Beef (bone-in): up to 14 days
  • Lamb: up to 28 days
  • Pork: up to 10 days
  • Ham: up to 30 days
  • Sausages: up to 9 days
  • Chicken (frozen): up to 12 months
  • Salmon (frozen): up to 12 months
  • Smoked salmon: up to 30 days

For longer storage, keep products frozen at -18°C, where vacuum sealed meat can last 1 to 3 years depending on the cut and consistency of temperature.

Once opened, the shelf life reverts to that of standard fresh products, so we recommend consuming promptly.

For longer delivery routes, some items may arrive partially or fully frozen to ensure they remain within safe temperatures during transit.

Why is my steak dark in the vacuum pack?

Our beef is vacuum sealed to lock in freshness and extend shelf life by removing oxygen. This can cause the meat to appear darker or slightly purplish due to natural myoglobin, which is completely normal.

Once opened, simply let your steak rest out of the packaging for 10 to 20 minutes. As it’s exposed to air, it will “bloom” back to its natural rich red colour. Rest assured, your beef is fresh and perfectly safe to enjoy.

Is it safe to eat?

Yes. If the “Use By” date is within range your meat is fresh. Any colour variation from vacuum sealing is normal and will return to its natural red once opened and allowed to bloom.

SB Marble Scores

What is an SB Marble Score?

The SB Score measures intramuscular fat (the white flecks in the meat). Higher scores mean more marbling, which results in superior tenderness, juiciness, and a richer, buttery flavour.

Which score should I choose?

  • SB 0–2: Leaner, traditional beef flavour with a robust texture.
  • SB 3–5: Our "everyday premium" level; a perfect balance of flavour and tenderness.
  • SB 6–10: The indulgent peak, featuring extreme marbling for a melt-in-your-mouth experience.

Delivery & Packaging

What are your delivery fees?

We offer a range of pickup and delivery options to suit you:

  • Free pickup is available from our Camp Hill store in Brisbane. Simply select pickup at checkout.
  • Free shipping is available on subscription-only orders.
  • Free shipping is automatically applied to orders over $200.
  • Refrigerated delivery starts from $30 (including GST), with final pricing based on your location, order size, and weight. Enter your address at checkout to calculate the exact rate.

All delivery orders are packed in a food-safe, insulated chilled box with ice packs to maintain safe temperatures throughout transit.

Can I request custom cutting instructions?

Yes, our butchers are happy to accommodate custom cutting requests where possible and safe to do so. For example, you may like a rump cap portioned into steaks. Simply specify your preferred thickness or weight per piece, such as approximately 2.5cm or 300g portions.

You can add these instructions in the “View Cart” section before checkout using the notes box or send them through to us via email.

How is my order kept cold?

We use specialist refrigerated courier partners to keep your order within the cold chain from dispatch to delivery. Each order is packed in a thermal carton lined with VISYCELL® sustainable insulation, a food-grade, biodegradable material designed to maintain a consistent chilled temperature throughout transit.

We also include large 1kg ice gel packs in every box to help keep your products at optimal temperature. Our packaging has been tested to maintain safe temperatures for a few hours after delivery when left in a shaded area.

My box arrived looking a bit scuffed. Is the meat okay?

While the outer carton may show signs of handling during delivery, the internal insulation is specifically built to protect the contents and preserve freshness.

What should I do if I have concerns?

If you detect any issues with the temperature or seal of your products upon arrival, please contact our team immediately so we can find a solution for you.

Our Beef

Where does our beef come from?

All of our beef is from our parent company Stanbroke Beef. This is important as the quality of the beef and ultimately your eating experience is determined by the care that has been shown to the animal during each stage of the production process. Any undue stress the animal experiences at any stage of its life is detrimental to the beef it will produce.

As Stanbroke owns and operates each stage of the production process, strict best practices are followed to ensure the animals always receive the highest of care and that’s why at Peter Augustus we can guarantee the quality of our product each and every time.

Striploin

Striploin, also known as Sirloin, New York Strip, or Porterhouse (when bone-in), is a premium cut prized for its bold flavour and balanced tenderness. It comes from the short loin of the cow and features a fine grain with a satisfying bite. It's a favourite among chefs and home cooks alike for its generous marbling and robust, beefy taste.