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JSB KNOCK OUT SLUGS .177/4.52MM 13.43GR 400PCS



JSB’s Diabolo Knock Out Slugs give absolute impact! Now available in .177/4.52mm 13.43 grain 400PCS. These hollow point rounds produce wicked terminal expansion and penetration on impact. This, as well as their weight, makes them perfect for hunting, pest control and long range shooting. Excellent BC ensures a flat trajectory and excellent energy retention.

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JSB KNOCK OUT SLUGS .177/4.52MM 13.43GR 400PCS

Get absolute impact with the JSB Knock Out Slugs .177/4.52mm 13.43gr 400PCS. These heavy hollow point rounds produce wicked terminal expansion and penetration on impact. This, as well as their weight, makes them perfect for hunting, pest control and long range shooting. Furthermore, their excellent BC ensures a flat trajectory and excellent energy retention.

They are the heavyweight .177 slugs in the JSB Knock Out range, weighing 13.43 grain with a 4.52 mm body diameter. JSB specifies an extremely favourable Ballistic Coefficient of 0.066. These slugs feature a distinct hollow point, manufactured in the soft lead JSB is renowned for. JSB designed them with a well recessed base, producing wicked terminal expansion and penetration on impact.

These slugs are designed to work primarily in High Power Airguns, known as FAC in the UK. Recommended uses for these hard hitting slugs are hunting and pest control. They are perfect for long range shooting, in excess of 100 meter.



Calibre: 4.52mm (.177)
Weight: 13.43 grain / 0.870 gram
Tip: Hollow Point
Base: Recessed
BC: 0.066
Contents: 400PCS


About JSB

The history of the company goes back to 1991. The former owner of the company, Josef Schulz, started the production of the sporting ammunition for air weapons under the name of JSB MATCH DIABOLO BOHUMIN. Josef Schulz is a former active gun marksmen and coach. After he finished with the active shooting and coaching, he started engaging in the research and development in the field of air guns ammunition production.

Based on his personal experience, later he had stamping machines made, on which he started to produce the ammunition. In 2008 JSB Match Diabolo a.s., which bought Josef Schulz’s company, linked up with the previous Schulz’s activity and soon after changed into an incorporated company.


Quality Control

The quality control of the products is done throughout the whole process of pellets processing. In order to guarantee the highest quality of ammunition, they start at the very beginning, with the raw material control. They require the lead to be in a certified cleanness of 99,97%. The whole process is, of course, a manufacturing secret. However, each semi-product must meet specific quality requirements, which they continuously control.

Even through the above stated production quality control, all products undergo hand-picked quality control. They do this in a special department, which employs specifically trained workers. Their working tools are a magnifying glass, a pair of tweezers, micrometer and a table lamp. The human eye is in this process an irreplaceable “tool”, which can detect even the smallest imperfection.

The hand-picked quality control focuses on shape imperfections that not only show the constant proportions and weight of the pellets, but also the accuracy of the production equipment setting. If all edges are sharp and the shapes are full, they know for sure that the proportions and weight are perfect.


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