One thing I found personally interesting was this:
I keep my AR-15 loaded with these just for that reason: https://www.midwayusa.com/product/95383 ... ed-varmintRifles—especially today’s wide array of 5.45 and 5.56 semi-automatic carbines and their “pistol” variants—are a very solid home defense choice favored by many firearms experts for their combination of adaptability, maneuverability, on-call volume of fire, precision, power, and magazine capacity, and while it may be a surprise to many, basic FMJ and varmint hunting rounds in these calibers tend to fragment and run less of a risk of over-penetration in common materials when compared to buckshot from a shotgun or a jacketed hollowpoint from a handgun.