Regarding Buffalo Bore's enhanced "FBI Load" and its handloaded emulation, what results do these achieve in terms of penetration-expansion - especially versus malefactor in winter clothing - compared with Remington's original +P 38 Special 158-grain LSWC-HP ammunition? I mention Remington's because it appears to have measurably higher muzzle velocity and softer swaged bullet than Winchester or Federal's version.

Buffalo Bore's advertising blurb mentions violent expansion with about 14 inches of penetration in gelatin without mentioning any thick clothing fronting the gelatin. If bullets of these enhanced +P ammunitions are essentially the same hardness as Remingtons, would increasing close range velocity by several hundred feet per second result in devasting but shallow would channels in that circumstance?

To venture into a less frequent circumstance, placing a barrier between target human being and bullet - a sofa or typically cheap room-to-room door, for example, does the velocity increase retard lethal penetration that your target is less likely to cease his activity when compared with slower original FBI Load?