I think you are going to have to open one of those shells & see what the shot is. It can't be MM as a 4MM (.1575") would equal to about a #1 US shot size, #8 being about 2.25mm. Burrard had a comparsion chart for various countries & gave Italian #8 as 450/oz while US #8 is usually given as about 410/oz. Certainly not enough difference to account for #8 & #4.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra