Brit 16's are nice, but they'll cost you maybe 25-50% more than an equivalent 12. And you'll find that there are a lot of Brit 12's that will weigh about what American classic 16's weigh. Not trying to steer you away from 16's; just suggesting another option. There are sub-6# Brit 16's out there, and that you cannot do in a 12, unless it's a 2" gun.