It only makes partial sense. Your rifle barrel & throat dimensions dictate sizing diameter, not the as-cast diameter of the bullet. I understand that you want to know the spacing of the lube grooves so you can order a die to match, but it makes more sense to buy your mould, slug your barrel, and do your own measuring so you get exactly what you need. As mentioned before, your alloy will be the greatest determining factor as far as final bullet dimensions. What will you do if the mould you buy ends up being dimensionally different from the mould belonging to someone else that you get your information from? Lyman's well known for making changes in bullet designs without notice.
