Possible barrel bulge

[OH Osthaus]

frosted or maybe rippeling ??

[J. A. EARLY]

Chambers recut out to 2 3/4" will appear that way. Not clean as when they are originally cut by the factory. Just my guess as I have several with that appearance. But is yours not done in the right side as well? Maybe someone only opened one side and quit for whatever reason?

[Pa SxS]

Are you describing the forcing cone? It's the transition between the chamber and the bore.