Quote:
Originally Posted by fuzzymcnab
Max, I agree that those extreme spreads look... Well, extreme. Any ideas why? How do you measure? In the past I often found it hard for my powder measure to drop little .380 loads accurately, but I would like to hear your opinion.
Fuzzy
|
Well I would have to speculate to answer this. I would guess that due to the smaller charge weights, possibly the powder is slightly position sensitive causing some charges to more fully ignite over others.
I measure by weighing each charge. I would not call these spreads extreme, since many loads with different powders are higher, but I personally like to see spreads below 50 FPS in pistol cartridges. For comparison, I only had two factory loads of all that I tested get below 50 FPS spread.
Powders that were below this threshold in some loadings (not all charge weights were) were Power Pistol, AutoComp, and 3.0 grains of TiteGroup. Some other powders were well over 100 FPS spreads. PP and AC had the most charge weights that were under 50 FPS spreads.
Mike