28 00 frame

[TxHuntermn]

Originally Posted by edgarspencer

I've read this over and over and it's not making sense to me.

What kind of instrument was the 'smith' using that can measure, and differentiate in ten thousands of an inch. Why is the Right barrel, one tenth tighter (.0001") than the left, called Modified, when the Left barrel (I agree that .026" is full), one ten thousands more open is called Full.
I agree that a conventional micrometer can measure in tenths (.0001") but I am not aware of gunsmiths, or anyone outside of laboratory conditions, measuring bores down to a tenth.

Edgar,

My high school English teacher would be embarrassed, I should have been more clear. The measurement he gave me was for MBWT, I cannot say what instrument he used. Bore constriction RB .010 LB .022. I don't know the gentleman, he was a gunsmith the seller uses. I just wanted to make sure the tubes were safe to shoot. Although they are decent, the bores do have some general roughness....I will hit them with a drill and frontier pads soon to see what the deal is there.