I said “7/8 oz is way too heavy for a .410”.

Still right as a generality, but I see that Cheddite offer a Draco Subsonic load at 24 grams which is very close to 7/8 oz.(24.82 grams).

I do not know the velocity, but take it that it is likely to be under 1,000 fps.

Applying Burrard’s “low velocity loads” theory with larger (for .410 ) shot sizes it might be surprisingly effective.

Anyone tried them?