There is no shortage of contradictory information on this subject. On everything from what grit/grits to use to how to bump up the lap.
On one hand, I've been told that when using poured laps, never allow them to exit the barrel. And if it does, discard it and pour a new lap as it's not possible to get it indexed back to the same land/groove position from whence it came. And I've also been told as the goal is to make the bore as even as possible, albeit with a slight taper to the muzzle, that lap/land/groove orientation is of no concern.
I've not allowed the lap to leave the barrel until I wanted to pour a new lap thus far. Do any of you who follow the 'non-oriented' method?
Thanks in advance for any advice.