I find the washed patching material (I use the #40 Cotton Drill cloth from JoAnn's) easier to cut at the muzzle not to mention softer to take on a bit more patch lubricant and the weave is tightened. Washing works for Cotton Drill, Pillow Ticking, Mattress Ticking, Denim, Canvas and Linen. My most recent batch of linen came from India and the weave isn't as tight as the drill cloth. Worked fine for the breeches I was making. The scraps shot okay.