Picked up a Colt Army Special in .38 Special this week. Tested it out, and it's a good shooter. Trigger pulls are heavy, but the double-action is glass-smooth with no stacking and the single action is super-crisp with virtually no over-travel. Since these guns were available in .41 Colt Long I had the thought of getting a .41 Colt barrel (which are readily available) and reaming the cylinder for .41 Special. Yeah... not going to work. Problem #1- the .408 bore of the original would be tight, it would work with .410 bullets... except when Colt converted this cartridge to smokeless they went from a heel-base .408 bullet yo a hollow-base .386 bullet and shrank the bore to .400. That will not work and play well with .410 bullets. Problem #2- measured and the cylinder wall thickness would be a bit sketchy in .41 Special. But... .30-30 brass can be cut and expanded out to take a .400 bullet, and thanks to .40 S&W and 10mm there are a plethora of .400 bullets available... time for .400 TCR? Cut and resize the brass to somewhere around .38 Special length and load it with a 200gr bullet at 900fps. or so... This could be a thing. Set it up for a three-inch gun with a modified grip as a carry gun... Yeah, this is going to happen.