The number of RIO Shells is the same as most other shotgun shells, it relies on the load, but I've noticed pictures manufactured out to sixty yards on waterfowl with RIO Shells. Even so, I do not like to push it much past 40 yards. But it's difficult to say https://redgearguru.com/history-of-the-colt-m1903-32-acp-tactical-handgun-top-ranked-firearms-2/second-amendment-faqs-guns-handguns-rifles-pistols-shotguns-firearms-55/