Slightly off subject but should be noted:

Here is the pressure information given to me by RST for 12 bore 2.5" loads:

Maxi-Lite, 1 oz. shot: 5700 PSI
Falcon Lite, 7/8 oz. shot: 5400 PSI
Ultra Lite, 3/4 oz. shot: 4400 PSI

Given the RST pressures and load variances, I would tend to choose these loads over other shells that "should" be ok.