"Theoretically" based on an even shot spread oz of shot should have about the same density @ 25yds as 1 oz would @ 35yds.
Shot of course do not spread with absolute uniformity.
I have never been a fan of the .410 personally so have not done any pattern testing on them.
It "May" be that they tend to throw patterns having a higher central core density than do the larger gauges. "IF" so they they would tend to be capable a a slightly longer range than theory on a well centered hit, but shorter on a fringe hit.
This of course all based on equivalent choking, "Not" comparing for instance oz shot from a full choke & 1oz from a cyl.
