Not quite, and not even the smartest way to do it. Try slugging the barrel and actually measuring it instead of guessing.The only way to find out if your particuliar barrel will work with a particuliar diameter bullet is to load it and shoot it.
Sorry, no guessing involved. I am not concerned about the diameter of my barrel, as long as the load is safe and accurate. Bullets ranging in diameter from .355" to .357" are going to be safe in a .355" bore, provided reasonable pressures are involved. It doesn't take much to swage a bullet .002" smaller in diameter. For that matter, it doesn't take much of a bump for a .355" diameter bullet to fill a .356" diameter bore.Try slugging the barrel and actually measuring it instead of guessing.
How, specifically, can knowing this measurement make any difference in how an actual bullet actually performs?Best way to find out which bullet will perform best in your barrel is to slug the barrel.
I too have an open mind, and can learn. I also have 2 barrels for my .38 Super Gov't model. One is an old skinny barrel, probably from the '60s, and it slugs .356". The other barrel is a more recent aftermarket jobbie, and it slugs .355". I also have a Colt Official Police .38 Spl revolver, of 1947 vintage, with a .356" barrel. Plus, an S&W model 13, with a .357" barrel.I have an open mind and can learn
You can't blame John Mose for that rim, since he died in 1926. From what I understand, he designed the .45 ACP to headspace on the case mouth after seeing the 9x19 Parabellum. Prior to that, everyone tried to headspace auto pistol rounds on the shoulder, in the case of the 7.63 Mauser, or on a semi-rim, as in the case of the .38 ACP.Too bad John Browning didn't think to loose that stupid rim back in 1929 and headspace the case on the mouth instead of the rim. If he had I think the Super would have been equal with the .45 in popularity.