Working more on barrel finishing prep on my fowler. I lightly draw filed the barrel, as Jim Kibler showed in his video. The machining marks were very minor so only slight draw filing was needed. I then began sanding with 220 and then 320 grit. I do not want to go finer than that as I plan to blue this barrel (don't want a shiny bright barrel scaring the turkeys this spring).
As I review my sanding work with opti-visor I see tiny strips of file marks here and there. By tiny I mean like a couple hundredths wide an inch or two long. I suppose one swipe more at that spot when draw filing created a tiny flat in the barrel that is below the round circumference of the barrel. I have sanded a lot going around, shoeshine style, to try to eliminate these but seem to be getting nowhere with them.
Maybe I should just do a sanding lengthwise, to eliminate the file marks. I am just not sure if doing it that way, which maintains the flat below the circumference (albeit a flat minus the file marks) will be more or less visible later.
I must say these are small marks, hard to see with bare eye but you do see a difference in the light reflection.
So, to sand (more) or not to sand, that is the question.