As with all projects like this, new problems crop up, but that is one of the reasons for starting this thread. With the barrel off I did a serious inspection of the bore and it is much worse than I thought. I have a number of big bore British single shots and love the idea of having one in .303. I emailed McGowen Precision Barrels and found they can provide a .311 barrel with the exact same taper as the present one. This is important because the taper must match the original so that the sights, swivel base and forend can be reused. Tomorrow I will have my retired gunsmith remove the sights and send the old barrel to McGowen.
This is the barrel with which I am starting:

Last edited by joelblack88; 05/19/10 03:49 PM.