a comparison of .25-caliber firearms is being reported, pitting new models against classic ones. however, the focus of the story is unclear, as some reports mention other calibers, such as 22 arc, .243 winchester, 6.5 creedmoor, and 6.5 prc, as well as unrelated firearms like side-by-side shotguns and air rifles. the relationship between these different topics is not evident.