The Pure Gold website states the following:
**NEW FOR 2012 IN THE STANDARD PORTED VERSION IS THE .660 RESTRICTION. BEST USED FOR SMALLER PELLET SIZES LIKE #6?s, #7?s AND SOME DUPLEX LOADS WITH THESE COMBO'S.**
I've read some of you highly suggest the Pure Gold .670 for the Winchester 1300 for shooting Hevi Shot #7,s and Mag Blend. Have any of you tried patterning this new .660 restriction for HeviShot #7's? Would it in theory be better for the #7s?