traditional handgun ammo in rifles. The numerous rifles on the market that are replicas or semi-replicas of historic US rifles are made in calibers of 45 Colt, 44-40, 357, etc. I am interested in what happens to the ballistics of a 45 Colt when fired from a 20 inch barrel compared to a revolver. I want to buy a replica of a Winchester 73, most likely in 45 Colt. Can anyone tell me where to check this out? If I go to a Winchester ammo catalog the ballistics are given but apply more to handguns for their handgun cartridges. The old 44-40 or 44 WCF was made for both handguns and rifles. So, history and the Winchester Company tells us that the cartridges worked to a great degree in rifles for hunting and fighting. I would like some specifics. Thanks in advance for your help. (I have my eye on a Cimarron brand '73, what do you think of my choice?)