The hidden liability of a RDS on a shotgun

[Unobtanium]

Some shotgun barrels are worse than others with walking shots when they heat up and warp. I have actually seen a barrel where the warping was visible to the naked eye after the barrel got hot. Cryogenically treating the barrel is thought to lessen point of impact changes with a cold to hot barrel. Many shotgun target shooters Cryo their barrels. Visit 300below.com in this regard. This is just an example of the first vendor I pulled up from a Google search regarding cryogenically treating a barrel. Cryo might not be on the radar of most defensive/combat shotgunners, and it might not be worth the cost for a home defense shotgun. But, if one is trying to eliminate changes in point of impact from a cold to hot barrel, it is worth investigating.

Cryo won't alter this. Design change is necessary to address it.