Posted by JL:

Quote:
My point about the more gradual taper is that a longer forcing cone would HAVE to be a more gradual taper, the angle would have to be less in order to make the cone longer, wouldn't it?


For a feller who's never cut one but has reamed a few holes with a taper pin reamer, the rate of taper of the reamer would sure appear to have some correlation with the length of taper it's possible to cut, allowing for the effect of the difference between diamaters of chamber and main bore. I can't picture what you're trying to tell us, Gregsy, altho I understand the example which in effect moves a steep cone five or six inches fwd of the actual chamber. Seems to me the extremes of possibility (of execution AND definition) aren't usually coincident with the normally chosen paths to optimum utility. Would this backas$wards "choke" on the wrong end of the gun with an essentially 5" straight section not get us into the old long chamber/thin wall bugaboo?

jack