12 Gauge shotgun shell recipe for 7/8 oz shot using Expansion Industries' ETR7 smokeless powder:
Remington STS hull
Winchester 209 Primer
20 grains ETR7 powder
CB 0178-12 wad
7/8 oz magnum shot
I've been using this recipe for Skeet and 16yd Trap and it works.
I am only using this in my O/U shotguns.
I have not chronographed this load and it is not listed on the manufacturer's data page.
I have fired 300 shells so far, no problems whatsoever and burns clean.