When I had earlier asked about U.S vs.European sizes, I had talked to Kari. At that time they had 5's in the 16 ga.along with the other sizes of shot. She said that the 5's and 6's were about a half size smaller, so that would equate to 5.5 and 6.5. I did not ask if those sizes would apply to the 12's. I did buy a flat of the F2 12'S in 6's with 2 1/2" lengths. If they were 6.5 sizes, that wouldn't hurt my feelings. Kari said that the smaller sizes which would be 7.5 through 9's are the same as N.A. sizes.I have not measured any to confirm the sizes.
What attracted me to B&P were the subsonics at $71.00 per flat. I, also, liked the pressure of 5800 psi for the older guns and 2 1/2". I have shot them at skeet and I should have bought several flats. "You snooze and you loose"
Make sure you talk to Kari when ordering. I let her know that I really like the 2 1/2" inch length, low pressure, and the price. It would be nice if we could get some of the more desireable shells, that may be available in Europe, shipped in on a limited basis.
Good luck!