I looked in the latest edition of reloading for shotgunners to see if there was any data in there for you and there is quite a bit data for buckshot using bpi multi hulls. Almost all of the new data for buckshot is converted birdshot loads including 100% of the ballistic products data. It tells tells you what components etc. and just gives the weight of buckshot to use (any size by weight) they did however carry over the old specific data from the previous manual.
There is a load calling for clays in the multi hull, but like i said in a previous post it is for 1 1/8 oz of buckshot, but you might as well use up that clays with practice loads since you can't return it.