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    20kg Bulk Box - Black Onyx Rump Whole SB-5

    $720.00

    20kg Black Onyx rump whole SB-5, 230 day grain finished. Reliable eating quality, good flavour and strong value for wholesale kitchens and butchers.

    Pickup available at Peter Augustus Store Camp Hill

    Usually ready in 24 hours


    Buy 20kg Bulk Box - Black Onyx Rump Whole SB-5

    Value-focused Black Onyx rump delivering dependable eating quality, solid flavour, and consistent performance for busy wholesale kitchens.

    Diamantina's 20kg Bulk Box - Black Onyx Rump Whole SB-5 offers a reliable eating experience, characterised by its SB-5 marbling that promises a tender texture and robust flavour. Our Black Onyx breed, grain-finished for over 230 days in Australia, ensures a consistent quality that enhances the natural beef taste. With a focus on reliable performance and cost-effectiveness, our Black Onyx Rump Whole suits a variety of cooking methods like slicing, roasting, and portioning, creating a versatile choice for culinary applications. 

    Buyers choose our Black Onyx Rump Whole for its unmatched balance of quality and value, ideal for chefs, caterers, and bulk buyers who prioritise taste and tenderness. Our product fits seamlessly into professional kitchens, offering a dependable choice for menu planning and event catering. As a product of Diamantina's renowned sourcing and feeding programs, our Black Onyx Rump Whole reassures buyers of consistent quality. Make your purchase today to experience the fine detail in flavour and texture that our Black Onyx Rump Whole promises.

    Product Overview

    • 20kg bulk box of Black Onyx rump whole (SB-5)
    • Grain finished for a minimum of 230 days
    • Cost-effective option with reliable eating quality
    • Good marbling with consistent beef flavour
    • Australian family-owned

    Why Choose 20kg Bulk Box - Black Onyx Rump Whole SB-5?

    Our 20kg Bulk Box - Black Onyx Rump Whole SB-5 offers exceptional value with its dependable eating quality and solid flavour profile.

    • Marble score SB-5 for superior marbling
    • Grain-finished for a minimum of 230 days
    • Originating from Australia, ensuring quality
    • Whole rump cut for versatility in use
    • Black Onyx breed is known for its consistent performance

    Performance & Quality

    • SB-5 specification for value-driven grading
    • Consistent texture and dependable tenderness
    • Reliable performance across multiple cooking methods
    • Balanced flavour suitable for everyday service

    Wholesale Advantages

    • 20kg bulk format for efficient production planning
    • Ideal for slicing, roasting, and portion control cuts
    • Strong yield with minimal waste
    • Cost-effective solution for high-volume operations

    Who Should Choose This 20kg Bulk Box - Black Onyx Rump Whole SB-5?

    Our 20kg Bulk Box - Black Onyx Rump Whole SB-5 is ideal for chefs seeking versatility and consistent quality. This cost-effective option is perfect for those requiring high performance and good marbling in their beef cuts.

    • Restaurants and catering services need reliable performance for large events 
    • Home cooks aiming to experiment with various cooking methods, like roasting and grilling 
    • Butchers offering premium grain-fed beef with uniform marbling to their customers 
    • Meal service providers looking for dependable eating quality in bulk beef purchases

    Best Cooking Methods for Rump

    Cooking the 20kg Bulk Box - Black Onyx Rump Whole SB-5 offers a rewarding experience. The grain-finished marbling ensures a tender texture, while its robust flavour benefits from varied cooking methods. Proper heat application enhances the inherent juiciness, and resting the Black Onyx Rump allows the juices to redistribute, achieving optimal tenderness. 

    Pan Sear: Use high heat to render fat and seal in juices. Sear each side for about 3-4 minutes for a medium-rare finish. 

    Grill: Preheat the grill to medium-high. Cook for 8-10 minutes per side, allowing the marbling to melt, enhancing flavour.

    BBQ: Maintain a medium heat to avoid over-charring. Grill for 10-12 minutes per side, letting the smoke infuse the beef.

    Oven: Preheat to 180°C (356°F). Roast for 25-30 minutes for a juicy, even finish, ensuring the beef is rested before serving.

    Delivery & Storage

    Delivered fresh, chilled in vacuum-sealed packaging for maximum freshness.

    • Store refrigerated at 0–4°C
    • Consume by the use-by date or freeze on arrival
    • Keep vacuum sealed until ready to use
    • Thaw under refrigeration before cooking if frozen
    • Do not thaw at room temperature
    • Do not refreeze once thawed

    Rump

    Rump steak is a lean, flavourful cut taken from the hindquarter of the animal. Known for its firm texture and bold beef taste, it’s a versatile favourite that performs well on the grill, in stir-fries, or as a roast. Cut thick for steaks or diced for hearty meals, rump offers value without compromising on quality.

    Frequently Asked Questions

    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.

    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.

    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.

    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.