I finally broke down the other day and bought some WIN 231 powder. I have been using Unique in my .38 SPL with good results using commercial cast 158gr SWCBB (tennesse Valley Bullets) bullets and the Lyman data from the cast bullet handbook . I decided to try WIN 231 becuase I keep hearing that as a whole it is a very accurate powder, and meters very well. At the moment I'm only going to be using it for standard pressure loads. I'm thinking along the lines of about 4.5gr of 231 behind some of Jessie's 158gr SCW bullets.
Then I got to thinking what if I end up really liking this powder and want to try some +P loads? So I referenced my two Lyman books and the confussion began as to which data I should follow using TVB bullets. Should I use the data listed for the #358156 (155gr) which lists the max +P load as 5.0gr or the data for the #358311 (160gr) which the max listed +P load is 5.2gr? Any of you WIN 231 users have any idea? For the moment I'm leaning towards the 358311 data as the 358156 uses a gas check. However I would like to hear from the more knowledgable folks here on this.
Then I got to thinking what if I end up really liking this powder and want to try some +P loads? So I referenced my two Lyman books and the confussion began as to which data I should follow using TVB bullets. Should I use the data listed for the #358156 (155gr) which lists the max +P load as 5.0gr or the data for the #358311 (160gr) which the max listed +P load is 5.2gr? Any of you WIN 231 users have any idea? For the moment I'm leaning towards the 358311 data as the 358156 uses a gas check. However I would like to hear from the more knowledgable folks here on this.