I also use the one for the k frame(10) for my Speed 6....it doesn't work w/ wad cutters,but anything that has a "point" to it it will...I had a real hard time finding a holster(lefty) for my spped 6....a kframe holster is preferable,but i ended up getting 686 sized holster w/ a thumb break...the gun flops around a little,but the thumb break keeps it in there...4" k frame holsters for lefties are rare I guess....