What rifle round will fire out of a .410?

The .45 Long Colt is similar enough to the .410 shotshell that it is interchangeable in the Thompson Center Arms Contender family of handguns/rifles. This is the only firearm that I have personally owned that was specifically designed for this interchangability. If you have a .410 shotgun of any make or model, you should consult the owner's manual or contact the manufacturer (if possible) before firing .45 Long Colt ammunition it. The shotgun may have a choke (fixed or removable) that could obstruct the passage of the .45 caliber bullet through the bore as it is fired; resulting in damage to the firearm, or the shooter. This goes back to one of the fundamental rules of firearms safety- never fire ammunition in a firearm for which the firearm was never designed to fire.