Would appreciate others chiming in....
Re QuickLoad and predictable results (input from another Forum):
There are three known powders whose burn characteristics literally come unglued
from their moorings when underloaded from a case-fill/volume aspect:
- H110/W296
- Lil`Gun
- Blue Dot
This isn't anything that a ballistics program can model. (In fact I'd probably have to
run some kind of 3D code that tracked every powder particle -- and the free space
around it -- when blown into the case volume as dust after primer ignition.) Think
grain elevator explosion vs controlled burn column.
Very fast powders seem immune to that. Slow -- especially spheroidal/coating-
suppressed geometries are susceptible when allowed to burn as a collection of individual
particles in a large free-space oxidizing environment.
Like any model, however, QL is dependent on the user having some idea about the
limitations of it use. One improvement could be a red flashing clown (worthy of
Stephen King) that would flash across the screen when those powders went below
90% case fill.
Others chime in/add to the list of squirrelly results/powders as they've found
and I'll add to my own list.
Re QuickLoad and predictable results (input from another Forum):
There are three known powders whose burn characteristics literally come unglued
from their moorings when underloaded from a case-fill/volume aspect:
- H110/W296
- Lil`Gun
- Blue Dot
This isn't anything that a ballistics program can model. (In fact I'd probably have to
run some kind of 3D code that tracked every powder particle -- and the free space
around it -- when blown into the case volume as dust after primer ignition.) Think
grain elevator explosion vs controlled burn column.
Very fast powders seem immune to that. Slow -- especially spheroidal/coating-
suppressed geometries are susceptible when allowed to burn as a collection of individual
particles in a large free-space oxidizing environment.
Like any model, however, QL is dependent on the user having some idea about the
limitations of it use. One improvement could be a red flashing clown (worthy of
Stephen King) that would flash across the screen when those powders went below
90% case fill.
Others chime in/add to the list of squirrelly results/powders as they've found
and I'll add to my own list.