As my original post stated, Im starting with their 1 oz load, and asking about if a 7/8 oz load would work with all of the same components beside that.
Piss poor in what respect? I want a light old-gun load using as much of what I have on hand as possible, and hopefully use less shot. Low pressure and slower than 1200fps is what I want.
I have some Clays, as well as some 4100 and 0175 wads.
Physically, the load is of insufficient volume to be compatible with a Remington hull.
Ballistically, it takes an already low pressure load to the point that reliable ignition is questionable, and incomplete 'thermal decomposition' of the propellant is virtually assured.
That's sufficient to earn a solid 'piss poor' from me.
Sending these off to be tested in a pressure gun to 'save money' seems a tad illogical. You might prove their safety, but you can't make the combination practical. You'll have shot in your pockets and weird sounding shells..
700X is dirty and smokey at normal shotgun pressure. Why it survives in the market against the modern powders is a mystery.
As suggested, American Select and the CB-0178 would work just fine and save aggravation.
Use the stuff on hand to make loads it was intended for.