I'm still playing with my 7.65 Argentine Mauser (also called Belgian Mauser) and researching how to reload ammo for it. Because of it's age, I want to slug the bore instead of "guess" on bullet diameter. My basic question is how to best slug the bore: Method #1: Someone I know has suggested the following method, using low-melting point lead. The first step is to block the bore using something tight fitting such as a disposable ear plug. This ear plug is inserted into the muzzle and then pushed down the barrel about 5 inches. Next, molten lead is then poured down the barrel and forms a "slug" on top of the inserted ear plug. Then this slug is then pushed thru the barrel using wooden dowels until it comes out the other end (chamber). - Will this method work? (I have never heard of this method before.) I have further been advised to get BOTH measurements from the slug, the lands AND the grooves, and that the final bullet diameter should fall BETWEEN those two measurements. Any advice? Thanks!