For a long time I have an insatiable urge to build a rifled 410 over-under from scratch. The barrels will be 12-13" long and I have 6, 8 and 14" bits to drill.
Yes, our convoluted Canadian gun laws make it legal to manufacture a short barrel for a hand operated rifle/shotgun as long as it was first made that long (or that short) as opposed to cutting down a longer barrel which is a no-no under 16".
But still no idea where to find a long enough piloted reamer. Does anybody make them or would soldering a regular chucking reamer into the drilled end of a round bar work?