to be honest,i blindly follow load data from books,including powder recomendations.i must have at least a dozen powders on the shelf,so i have no favourites.i am disapointed reloader has suspended sales though.i am sure that the pressures on these long light bullets will entail specific load data.im not even sure my 1 in 10 shilen will stabilise,yet i cannot find any info on these bullets