I usually load 23-23.5gr under the 240s. If you look at the Hodgdon data, the velocity with 24gr is IIRC, about 75fps more than with 23gr, but the pressure is markedly higher. I figure the lowest load that gives good accuracy is what I want. Might be a bit easier on brass than the top load, which might matter at times.
After reading Brian Pearce’s article on primers in the 2015 Hodgdon Annual, I use standard LP primers since they work well in mild weather, and it simplifies things.
