go up to ace hardware and pickup some stainless steel washers #3 or #4 get a bolt that fites the washers and get a nut put the washer on the bolt and take nut and tighting with washer centered on bolt put bolt in drill then take a file and run the washer on the file make the first one were it will go in the primer pocket ez then take your washer and lay it flat on file rube back and forth to get the thickness you what I use only CCI 209m primers with about .004 crush on the primer not all gun are the same on thickness on the washers have to fit it for your gun