ABPOS, I have a lot of respect for the amount of time, expense and effort that went into the Lucky Gunner tests but just keep in mind that the gel used is not the same ballistic gelatin used as a standard by Dr. Roberts nor the FBI protocols.

That said, it is useful for comparing results against one another in the test but not necessarily for determining the efficacy of the ammunition per the aforementioned protocols.

I think the tests run by "Shooting The Bull" on youtube come closest to meeting those standards and this opinion has been shared by others with expertise in this field of research.

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642-1, M&P15 TS