While cleaning a couple of 92 and 94 carbines with shorter than standard magazines, I noticed that the magazine tube hole in the forend is drilled at an angle.  This slight angle causes the magazine tube to contact the bottom of the barrel to allow for the magazine plug to have a locking point.  Each magazine length has a different angle drilled in the forend.  Just another notation of Winchester’s ingenuity.  If this topic been discussed before, I missed that topic.  Roger B.