Everyone who has listened to gunshots in close proximity knows some cartridges are much louder than others. In the other direction, some cartridges are much quieter than others.Everyone understands a .22 LR out of a rifle is much quieter than a .338 magnum out of a rifle.Not as widely understood, loads for the same cartridge vary widely in how loud gunshots are perceived. The .22 Long Rifle cartridge is a good example. The highest energy .22 LR cartridges, such as the Aguila Interceptor and the CCI Velocitor, are much louder than CCI Standard Velocity, even though all are firing 40-grain...