Anyone have any thoughts on loading for an old 742? I am going to load Barnes 200gr. TSX to 3.28" (Rem. 220gr. OAL 3.28" have been tested and do cycle reliably and are quite accurate). Will be using Win 1X fired brass and Win primers. Any idea what type of powder to consider? The Barnes website shows RE15 and Hunter (more case fill and higher velocities). Am trying to be prudent since I have never loaded for a semi auto before, only bolt guns. Definately want to settle in at about my max load. Any thoughts to consider?