Mine are older tins Bri from a few years back.
I've thrown most tins away but still have a few ...
14, 18, 21, 27. They aren't one off tins. I've had plenty of each.
18 were an interesting few tins. 3 out of 5 grouped superbly. 2 out of 5 flyers. I visually inspected them and found 2 out of 5 with obvious defects ( badly bent tails and/or little blobs of lead on edges of tails ). When I dumped them and shot the visually inspected good 3 out of 5 out of the tin the groups were very good.