was that the long distance between the bullet and the forcing cone caused accuracy problems for me, and even though it has .451 throats, I just could not find a combo that would seal well enough to produce decent FPS rounds; accurate, but in the 700+ range from a round that produced apx 1000 fps out of a 1911. The 45win mag's loaded to 45 colt levels really worked. They are only an 1/8 inch shorter than the colts, and provide quick reloads in moon clips, and no cases trapped under the extractor ala 45 colt/25-5. This combination made the gun for me. Pinnacle did my work, and I had them do several other things while there. It is now one of my favorites.