Quote:
I cannot be 100% sure because I don't have the kind of equipment I need to truely test the theory ($,$$$,$$$.00) but I am pretty well convencied that the reason that the Lyman 525 wad-slug is accurate only so far out and then becomes un-stable when fired from a smooth bore is because the design is naturally stable in super-sonic flight but is not naturally stable in trans-sonic or sub-sonic flight. Thus, once the slug flies far enough down range that it is starting to slow down and drop into the trans-sonic flight range it becomes un-stable in flight if it doesn't have a gryo spin from a rifled barrel.
Sounds reasonable to me, but have you done considerable testing with different wads to see how your results changed? I tend to have better results with Federal wads, but have done well with the old AA12f114 wads as well.