Originally Posted by
SkyLine1
I've used the RCBS and Forster dies for 300blk, they both work well-no shim needed. I like the Forster seating die that is micrometer adjustable. It makes switching from super to sub rounds faster and if you keep a log you can adjust on the fly also with powder charge if you have the micrometer adjustable powder bar as well. Log your settings for your rounds, check your notes and adjust then check your first few powder drops and seat/measure your first few rounds.
All of my 300blk is loaded on a 550b.