A light grease like TW25B is good for this. Once this location is appropriately greased It is very good for Countless cycles. Concerning the results of rounded rifling on precision, the rifling provides an angular velocity to a bullet so applying abrasives close to the muzzle will make imperfections https://telc70123.blogvivi.com/36687611/little-known-facts-about-telc考试报名