My 1300 NWTF with a Comp-n-Choke liked the XX Magnums the best, but I have shot a lot of HV too. I always shot 3-2-6's and if he was 40 yards and in he was toast!
With the Pure Gold in it last year, I shot some patterns with XX Magnum 3-2-4's as that is all the lead I had when I patterned. It was acceptable out to about 32 or 33 yards. I went with Nitro 4x5x7 and H13 3-2-7 and never looked back.
My Model 12 30" Full likes the HV 2.75-1.5-5's the best.