Working on developing a cast boolit load for my .243 M700. Gun is about as accurate as one can expect from a factory barrel with a couple thousand rounds down the spout...i.e. 2 1/2"-3" @ 200 yds with 100 gr. JBs I recently acquired an NOE 244-75FN from a member here but none of reloading manuals have any data for a 75 gr. cast and a search here didn't find much except for a couple of 5-year old threads mostly concerning heavier boolits. My first attempts haven't been all that successful: 1 1/2" @ 50 and around 3" @ 100 from loads extrapolated from 85 gr. data in current (and old) Lyman Handbooks. Any shared experience or advice would be appreciated.
Bill