|
Using a round bolt head or a countersink (the tool shown by the OP) can cut the crown unevenly; you need the crowning/champfering tool with a guide.
The neatest tool I have seen, which works with a lathe having a hollow headstock, is a tool ground in a shallow "U" shape. It is set up so the tool is parallel to the barrel and then moved straight into the crown, cutting, smoothing and facing all at one pass. The shop needs several for different barrel thicknesses.
Jim
|