Copper hunting bullets (KJG) from SAX - not all copper is the same!
One Copper alloy only lays the foundation for the material properties.
Completely Identical alloys can be used for Material properties such as hardness, tensile strength and breaking elongation limit are far apart. The The desired material properties ultimately result from the type of processing in the rolling mill.
Through Rolling and pulling the copper bar material is solidified and compacted and obtains its final material properties - as desired or defined by SAX.
Almost all manufacturers who produce copper bullets use the deformation method (forming by pressing). As the name suggests, these projectiles are designed to deform and gain 100% mass if possible.
Advantages through deformation (quasi forging by pressing):
- high Residual weight ensures good depth effect
- Deformation creates a large surface area which leads to increased energy output and increased shock effect
- Soft copper alloys are relatively inexpensive
Standard copper - the disadvantages:
- Use of soft copper alloys is necessary. Otherwise the copper would splinter or break during forming
- The soft alloys lubricate particularly strongly in the runs
- The soft alloy has a particularly negative effect when forming bullets with guide bands. The guide bands are too soft (not resistant enough). When they enter the rifling and fields, they smear too much. The result is poor guidance and inadequate stabilisation of the bullets. Result: Poorer precision!
- Soft alloys are extremely difficult to machine. (in lathes) (this is why various manufacturers try to press the bullets!)
- Pressed copper bullets compact the material differently in the mould. This leads to an uneven distribution of mass in the bullet. And this in turn leads to imbalance, which has a negative effect on accuracy!
- Despite the soft copper alloy, copper is considerably harder than lead bullets. For this reason, the copper bullet requires a high impact velocity in order to respond and mushroom with the appropriate mass and tissue resistance.
- with poor shots (e.g. woad shots) the killing and shock effect is almost zero
- When shooting at strong tissue (venison) and bone areas, an excessive and unnecessary amount of energy is released, which leads to extreme destruction of the venison!
SAX takes a different approach with speciality copper - WHY?
The Sax manufactures KJG (= copper hunting bullet) for cartridges as partial fragmentation bullets. If all parameters (alloy, material - processing, construction and ballistic data of the bullet and the cartridge) fit, the Sax KJG partial fragmentation bullets offer a multitude of advantages!
