- 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?
What is "Filling Percentage", "Fill Rate" or "Load Density"?
The Filling Percentage is the effective or usable combustion camber volume occupied by the charge. This is also also named "Load Ratio" or "Fill Rate" and con be found in most reloading manuals.
The Effective Combustion Chamber Volume is further explained here.
The volume occupied by the charge is equal to the powder bulk density multiplied by the weight of the charge. The powder bulk density can be found in our powder/propellant database.
- Fill Rate = volume occupied / usable combustion camber volume
- Volume Occupied = charge x bulk density of powder
- Usable combustion camber volume = total case volume - volume occupied by seated bullet
Important notice: Reloaders commonly try to operat with fill rates between 80 and 100%. Loads below 80% can be dangerous as they can produce very unsteady results. Loads above 100% are "press loads". They also produce unsteady results and often dangerous pressures.