Rancorous debate often accompanies the topic of selecting a self-defense cartridge. Everyone has an opinion and cites various authorities to bolster their positions.
Perhaps the most frequently used standard in the best caliber for self defense debate is the FBI ammunition test protocol. But, is the FBI testing method good for predicting effectiveness of ammunition? If so, does this ammo test hold the same relevancy to the general shooting public that it does for the federal law enforcement agency?