Agree on the 1k poor bore up to a max of 2000us.

But what is "poor" ??? Metford rifling looks pretty poor to the unknowing....Cabela's has the market cornered on the unknowing in charge....The only C.W. Andrews I have handled was a 450/400 on a Lancaster spring actioned with oval bores. Could/would there be a possiblity of a lancaster oval/invisible bore in a Lee ???

Then again of course the bore could be just plain rotted away.........