I have a 25-9 that I shoot cast lead bullets in I use a 250 grain cast lead bullet on top of 5.6 grains of Bullseye. I use this loading as it is what was designed for my Colt M1909 U.S.Army. The War Department wanted a 250 grain at 725 FPS for the 1909 This loading works well in the 25-9 and the 1909 Also does not beat up either revolver, being especially careful of the 1909 as it is 112 years old.

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USMC 69-93 Combat Pistol Inst.