For my Krag .30-40 that measures .308 grooves, I bought a Lee .309170 mold. I'll be using reduced loads with H4895. I re-read a lot of posts about cast bullets for the Krag, and it seems that they like larger bullets, but not too large: .311 is popular. The .309 bullets seat easily in a sized case - larger bullets would need an expander die. But, could the .309170 cast bullet be too small, or is it a "try it and see" thing (I can return the mold before I use it).