Importence of the wad stack

[Kurt]

Drive the guide pins out and lay some 600 grid wet paper on plate glass and figure 8 both block halves till the high spots are gone. Most likely they will not sand the vent lines out. Then go to the auto supply and get some valve grinding compound and screw a #7 or 8 hex head sheet metal screw in the center of the bullet and use a drill motor and lap it round again if it needs it.
Done this just recently to one of mine.
Solved that problem.