Quote:
The 28 would actually have a slightly longer range,


Please elaborate. Physics is physics, and the pellets don't care whether they are launched from a big tube or a small tube. It's mass x velocity and air resistance and gravity, once they leave the muzzle, all other things being equal. Unless the argument is that the trailing pellets fired from the smaller tube are able to draft behind the leading pellets better than those from the larger tube because of pattern dispersion.