jro45;
Yes, they do make appropriate 16 "low brass" loads. Federal load H160 is available with 1 oz of # 6,7 and 8 shot at 1165 fps. I use this load in an older, very light German 16 ga double. It is very pleasant to shoot, doesn't overstress the gun and performs very well.
Shot shell performance doesn't get much better with speed. In fact, unless the pellets get harder, patterns can get worse as velocity increases. People hunted birds for hundreds of years with velocities in the 1000 to 1150 fps range. These speeds still work today for lead pellets and put less stress on the gun and shooter.
I shot 12 gauge, 1 1/4 oz, # 5 1/2 shot at 1050 for the last two years in an old English 12 ga and no one remarked on how ineffective those shells were. To the contrary, everyone remarked how well that gun took birds even on long shots. That's because I can concentrate on the shot instead of the recoil.
This year the Kettner 16 ga has taken doves, pheasant and sharptails without any problem. Call your local dealer and ask him to order some Federal H160 in #6 and have a great time.
dwl