It may well be noted the .410 plastic wads I have (Rem PP) do not have a cushion section as built. They are simply a cup wad & shot cup combined into one piece. Some "Very Old" data I have for paper cases with card & filler wads called for 7 grains "Infallable" powder with 3/8 oz shot for the .410. Infallible & Unique have been stated to be identical powders. .410 cases of this era also used a milder primer than the larger gauges I believe. I "Am Not" recommending this as a load, only stating some old loads.
