I like their products. On their website, Rainier recommends using load data for a similar shaped lead bullet. Or halfway between jacketed min and max. The lead load data has worked well for me with 230 & 200 gr RN for 45 ACP and 100 gr RN 380 Auto bullets using Lee and Hornady load books. I use 5 gr of Win231 for the 230 gr.
Also, they mention a factory crimp die will distort the bullet and accuracy/consistency suffers. I found that to be true, the bullets will keyhole in some cases.