I feel a little silly asking this, but I've never been sure what BBL stands for. I know it refers to the barrel, and I used to think it meant "bull barrel," but I've frequently seen it used to refer to barrels that I wouldn't consider "bull barrels" (which, to me, means a large diameter heavy barrel with little or no taper). Anyway, I'm sure many here can clarify this for me. Thanks.
Doug
Doug