[Scorch]

The old "Dollar bill" test was supposed to be for a folded dollar bill, so about .010"-.015" of clearance (thickness of a dollar bill is about .005" to .007"). I free-float rifle barrels so that a sheet of 80 or 100 grit silicon carbide sandpaper will fit between the barrel and the stock from the forend tip up to the chamber area, about .020" - .025", roughly the thickness of a business card. For heavy forends, I will inlet it closer; for thinner, more flexible forends I will give a little more clearance. That way I don't worry about one of my customers using a really tight sling for shooting.