I recently shot my new Maxus 26" with a Hevi13 choke and got 240 with the 3.5 #6's and I think about 190 with the 3.5 MB's. Oddly, the MB's also had a better outside pattern than the straight 6's did and the 6's definetely had a hot core.
Those MB's arent fun to shoot though compared to the 6's!
Nice shooting though tomtamer.