Peter, I can't remember off the top of my head what the optimum string gauge is for the "Briggs tuning," but we have had several discussions about it here, you might try searching "string gauge" or something.  I order my gut strings from Bob Thornburg of Sierra View Music out in your home state, and he knows just the right gauge to send me.  

Thank you, Carl! I'll contact Bob.

Peter

Also, the gut set sold by Bob Flesher is a great set. I use them or Aquila Nylgut Minstrel Strings on the banjos I make. The Elderly store has taken the time to guage the Nylguts.....http://elderly.com/accessories/items/ANGMB.htm