I've mixed thoughts regarding the Lee die established. The First Price tag makes them seem inexpensive BUT in the long run, just after needing to buy a separate expander die (IMHO, you may need an expander die because it would make placing the bullet into the case a no brainer) https://codyemlrk.snack-blog.com/38628839/the-5-second-trick-for-300-blackout-cases