Just read an old article about loading .45 ACP to resemble the original Colt .45. His best result was 1 inch 5 shot groups at 20 yards using
NWCP 260 Low Velocity JHP/5.5gr. Unique at 802 fps
NWCP 260 Low Velocity JHP/6.0gr. Unique at 895 fps.
His fastest load was
H&G #68/7.0gr. Unique at 1,043 fps gave him 1 3/8 inch groups. Although he said his personal favorite load to get max performance in an XD was
Oregon Trails SWC 255/6.0gr.Unique at 964 fps
Oregon Trails SWC 255/6.0gr.Universal at 955 fps
gave him 2 inch groups at 20 yards
He gave repeated warnings that you shot these loads at your own risk. That they were carry shoot rarely loads and not for practice or plinking. Anyone have any experience shooting anything like these loads?