- How to unlock restricted load data?
- How to redeem discount voucher?
- Create and use wishlist / bookmarks
- How to rate and comment xxl-reloading?
- Powder criteria to be listed in load table
- Why do loads differ from other soures?
- Can I deviate from the load data?
- What is "Filling Percentage", "Fill Rate" or "Load Density"?
- Which saftety standards define the maximum allowed pressure and standard cartridge dimensions?
- What is V(0) and V(0)*?
- What is "propellant combustion" or "powder burnt" or "z"?
- What is the Effective Combustion Chamber Volume?
Why do loads differ from other soures?
We sometimes get asked why out loads differ from other sources. Often it is then the case, that different components are compared. Please make sure you compare apples with apples. If loads still deviate, it mostly can be attributed to the following reasons:
Our load data (maximum load) contains at least a 10% safety buffer in regards to the maximum allowed pressure for a specific caliber . Hence, our listed maximum loads might be lower than loads proposed by powder or bullet manufacturers who do not include such a safety buffer.
The charge (weight of the load) is the key driver for the maximum pressure achieved by a reloaded cartridge. However, there more factors and specifically those that influence the free combustion chamber volume. The general rule is: The lower the free combustion chamber volume, the higher the achieved pressure for an identical load, hence cases with a lower volume generate higher pressure.
Hence, cartridges with lower overall length (OAL) in the same caliber and with the same bullet also create higher pressure because the bullet seating depth is higher and the free combustion chamber volume is lower.
We provide for each load the underlying cartridge specifications: Bullet Length, Case Length, Cartridge Length / OAL, Seated Depth, Case Capacity. Reloaders might deviate at on own risk from our load data if their cartridge specifications deviate:
- Bullet Length: with all other specifications being equal, greater bullet length allows for less powder
- Case Length (l3): with all other specifications being equal, greater case length allows for more powder
- Cartridge Length / OAL: with all other specifications being equal, greater OAL allows for more powder
- Seated Depth: with all other specifications being equal, greater seated depth allows for less powder
- Case Capacity: with all other specifications being equal, greater case capacity allows for more powder