So I’m calling it a jacket, because it is not a patch in the normal sense. I am trying to cover the lube on a .357SIG, because a part of the lube groove rests inside the case, touching powder. I’m not covering the entire lube groove, in case the paper does not come off when fired. Ideally, the barrel throat would rip the paper off. This boolit is sized for typical groove diameter, and the paper is a single layer of cigarette paper that adds 0.0015” to the diameter.
Any thoughts or recommendations before I go too far?