This is my first post. Been reading for about 6 months. Great website!! I found this website from an article that Ian wrote about long range hunting. Thanks Ian!! I have been using a Lyman F/L die and want to start neck sizing. I don't understand the difference between the Redding "Competition Bushing Neck die" vs the "Type S Neck Bushing die". Also, my avg. smallest neck on my .308 loads measures .337". The Sinclair catalog indicates I should I get a bushing that is .001" smaller. Read several posts that suggests getting a .336, .337, and .338". How will I know which one to actually use? Thanks!