Colts in 44-40 are usually correctly dimentions as opposed to those chambered in .45 colt. Barrels are a correct .427 (Colt .44 spls also carry .427 barrels) and chamber throats usually run .428/429. The early Rugers in 44-40 were the ones that used .429/430 barrels, and I believe that they have changed that since then. As for timing issues on a Colt, that is usually not a problem unless the gun has been abused or tinkered with. And MOST people who own a Colt are not inclined to abuse them much. I find that the 200 gr bullets of the 44-40 makes a nice, mild shooting gun that still hits hard. (of course thats assuming you are not talking 'cowboy' squib loads) I think you would enjoy the Colt. Get it and go have some fun! 44 Man