goatbrother.. I know what you mean. When all other caps fail, the RWS will set the rifle off. How or why I do not know, but I got turned on to them a long time ago by an old (now passed away) muzzle loading friend. He did a lot of turkey shoots, and Rendezvous shoots in Wisconsin. He always shot RWS and actually refused to shoot anything but them. He told me that they RWS will not fail me. Other then they are tight to load on one of my White rifles, they are all I use "when I can find them."