I propose, without the means to put it into action, a test. Gather a handful of experts and a handful of handguns that are available in 9MM, .40, and for the heck of it .357 SIG with no markings indicating their caliber.
Each expert fires ONE gun, 9 shots, and then a final shot into ballistic gelatin. They are then allowed to examine the ballistic gelatin minus the projectile.
How accurate do you think each individual is going to be in identifying the caliber he or she fired?
I think you might be able to ID the 9MM vs the .40 vs the .357SIG if you fired them next to each other. But I am curious if you could without the benchmark of firing the other ones at the same time.
Each expert fires ONE gun, 9 shots, and then a final shot into ballistic gelatin. They are then allowed to examine the ballistic gelatin minus the projectile.
How accurate do you think each individual is going to be in identifying the caliber he or she fired?
I think you might be able to ID the 9MM vs the .40 vs the .357SIG if you fired them next to each other. But I am curious if you could without the benchmark of firing the other ones at the same time.