How to interpret barrel weight?

[AeroncaTAL]

Ok, here is what may seem to be a dumb question, but I've seen references to the weight of a barrel; for example a "B" weight barrel. How does one interpret the different letter designations for the barrel weight?
Scott

 

[djnye]

the designation doesn't refer to weight, but rather profile. in any one profile the weight varies by the caliber--larger calibers will be lighter.

take care, daniel

 

[AeroncaTAL]

Thanks Daniel,
I was just over in ALR (that other forum) and the same question was posted. Don Getz gave a detailed explanation...
Scott