Maybe there is a as yet unknown or unremarked upon cause for this "miraculous" bullet...but I haven't seen or heard one yet that casues me to think otherwise.
Consider this, especially the section entitled Why not Experiment? about 3/4ths of the way down the page.
Interesting link, thank you.
I'll be watching for the results of this latest set of tests.
Doubt anything will be resolved......(grin)