I have a Glock 23 .40 Cal. and love it, but now I have a problem. I only use Glock magazines and my 13 load and my 15 load is very hard to get into the magazine chamber. Getting them out is a little easier but now much. Right now I carry the 13 in the Glock and have the 15 for replacement. I am extremely wary of putting any time of lubrication on the magazines. Has anyone else had this problem and if so how did you correct it?