JSB, a renowned Czech manufacturer of airgun pellets, has introduced a clear way of displaying product specifications and manufacturing information on its tins. Pellet weight, caliber, head size, machine number and production batch all have specific meanings. Here is how to read a JSB label correctly and what to look for when choosing pellets.
Key Takeaways
- Individual pellet weight is shown in grams and grains, while “500 pcs” indicates the number of pellets in the tin.
- The .177 marking indicates 4.5 mm caliber; 4.52 mm specifies the head diameter of that particular pellet variant.
- The machine number and batch number help identify the pellets' production origin.
- The QR code, EAN barcode and recycling symbols provide additional information about the product and packaging.
- Markings alone do not guarantee better accuracy – how well a pellet fits the barrel also matters.
How do you read the markings on a JSB pellet tin?
Using the popular JSB Exact Classic pellet as an example, we explain the main details displayed on the label. Knowing what they mean makes it easier to compare products and identify the correct pellet variant.
| Marking | Meaning | What you should know |
|---|---|---|
| 0.547 g / 8.44 gr | Pellet weight | The weight of an individual pellet in grams (g) and grains (gr), a unit commonly used in shooting sports. |
| 500 pcs | Quantity | The tin contains 500 pellets. |
| .177 | Caliber | The imperial designation for 4.5 mm caliber. |
| 4.52 mm | Head size | The nominal head diameter of this particular pellet variant. |
| M 24/23 | Test Center No. | Identified in JSB's illustration as a test center number; it should not be interpreted as the manufacturing date. |
| 65 | Machine Number | The identifier of the machine used in production. |
| 0 | Batch | The production batch designation. |
The clear label layout allows shooters to identify key pellet specifications quickly, without having to decode long strings of numbers.
Machine and batch numbers – why do they matter?
Consistent pellet characteristics are particularly important to precision shooters, including those competing in Field Target (FT) and Hunter Field Target (HFT).
The machine and batch numbers help identify where a particular tin of pellets came from. Shooters can record the details of pellets that group well in their air rifles and then compare the results with pellets from other production batches.
To learn more about JSB's earlier production identification system, read our article What Do JSB Pellet Series Numbers Mean? Debunking the “JSB Die” Myth.
4.5 mm caliber vs. 4.52 mm head size – what is the difference?
This is one of the most common questions when choosing airgun pellets.
The .177 marking indicates the nominal caliber of 4.5 mm, whereas 4.52 mm refers to the head diameter of a particular pellet variant.
JSB offers selected models with different head sizes. The difference may be only a few hundredths of a millimeter, but in precision shooting, even a small variation can affect how the pellet fits the barrel and the group size achieved.
That is why the best way to choose a head size is to test different options in your own air rifle.
Additional symbols and codes on the packaging
JSB labels also include markings that make the product and its packaging easier to identify.
- QR code allows encoded information to be accessed quickly using a smartphone.
- EAN barcode is used to identify the product in retail and distribution systems.
- 40 FE symbol indicates steel packaging material and relates to waste sorting and recycling.
- Open-book pictogram reminds users to consult the relevant product information and instructions.
Do the new markings affect JSB pellet quality?
A change in how information is presented on the packaging does not automatically mean the pellets themselves have changed.
JSB has long emphasized quality control throughout its production process. Its pellets undergo quality checks, including grouping tests carried out under controlled conditions.
Clearer labeling helps shooters distinguish between pellet variants and keep records of the results obtained with individual batches.
For users, the main benefit is easier access to the information they need to make an informed choice of airgun pellets.
JSB pellets at Sharg.pl
Sharg.pl offers a wide selection of genuine JSB pellets for sport, recreational and precision shooting. The range includes popular lines such as Exact, Exact Heavy, Express, RS and Match target pellets.
Explore the full JSB pellet range at Sharg.pl and choose the weight, caliber and head size best suited to your air rifle.
FAQ – markings on JSB pellet tins
No. The .177 marking indicates the nominal caliber of 4.5 mm, while 4.52 mm specifies the head diameter of that particular pellet variant.
No. The machine number identifies the production equipment. Accuracy also depends on how well the pellets fit the barrel and on shooting conditions.
It should not be read as a manufacturing date. In the supplied JSB illustration, it is identified as “Test Center No.”
It helps identify a specific production batch so that you can compare its grouping results with pellets from other tins.
The weight of an individual pellet is given in grams (g) and grains (gr). The example label shows 0.547 g and 8.44 gr.