Mullered borders are only done by hand AFAIK, and they would not take much more time than conventional borders, but it would require a pretty snazzy rifle to make it worthy...
Sorry, but it is obvious you have never done Any mullered border checkering
You would be very wrong there. I suggest you reread what I said.
I was referring to your comment about "...they would not take much more time..." Again, obvious you have never done it, sorry, but.. I normally agree with most of your comments but no this one, Mullered borders take more time to do.