too many get all axle wrapped over specific data for specific powders.
we know clay dot burns like clay's but is probably made with a different process and base materials.
so we treat it like a fast lot of clay's until using it say's otherwise.
look in your load manuals at other powders in this same burn speed family.
what does clay's say?
now how about bulls-eye, red-dot, 700-X, WST, E-3,,, and a slew of other powders in the top 6 of burn speed.
they will all show you a load amount of 4-6grs. providing a window for an unknown but similar burn speed rate powder.
how do you think the testers know where to start testing?
they sure don't start at 1gr. and work up, they quickly see what other powders in the same burn range have for data and start in the middle looking for a stop point with their measuring equipment.