Many years later I noted that there are cartridge conversions for "44 caliber" revolvers which are in 45 Colt. I know that the 45 Colt fires a bullet that is much too big to fit down the bore of the revolver I had back in the day. In talking with a fellow gun enthusiast I was told that the Italian makers had reverse-engineered their products to fire a 44 caliber bullet while the original "44 caliber" Colt revolvers actually had bores that were about 0.452 inch diameter. We assumed that the original guns were referred to as 44 caliber because that was the size of the ball you would use with a patch in the guns made back then. If the above is true I guess there must be a lot of replicas from 30-50 years ago which were made in the smaller 0.440 bore. I assume that current production replicas are now being made with 0.452 bores (or something very close). Does anybody have more information on this subject?