You can mess with these things forever trying to get a perfect fit. It's good to have an excellent fit but perfect is, well- rare. One approach to check if your fit is very good is to degrease the breechplug and paint the end of the plug with cheap model paint or nail polish. These go on much thicker than transfer dye or magic marker or inletting black, which have practically zero thickness and make it look "bad" if you are missing contact by .001". Anyway, with a thicker "paint" on the plug face, this will show where you're not getting even decent contact. I've rarely been able to get nearly complete contact between the plug face and the breech as judged by transfer dye or magic marker, etc and inletting black smears around so I do not use it here. Of course when you are done you clean off the face because you don't want a girly gun. :crackup: