Larry;
The numbers in the 2nd paragraph were simply a typo they should have all been #6. I have edited it to read correctly. I have seen all these numbers from various sources over the years. For this [particular post I just grabbed my old Greener book & copied them off. The fact there has been different standards over the years is why there is such confusion. Even at the present standard of Brit #6 = 270 per ounce the answer to the Original Poster as to what does British #6's compare to in US sizes they are still closer to #7 than any other available, that's all I answered in the first place.
"IF" you'd just get off the Kick of Trying your best to make me look like a Fool on everything I post we'd both be a lot better off. I had given the original poster the info he was looking for & you had to try to make me look as if I knew not what I was talking about.
Whether they be US #7 or Brit #6* @ 300 to the oz that's 11% more shot than 270 per ounce. 270 per ounce has about 20% more shot per ounce than US #6 @ 225. "So Yes"; Brit #6 is closer to US #7 than any of our other shot sizes.