The .25 WSSM is in a different league then the .223, the .25 is a very fast, flat shooting, hunting rifle, more suited to deer and Antelope hunting, possibly some varmint hunting although prolly considered overkill. The down side would be barrel wear makes it not suitable for a target rifle, as well as noise/blast, and increased cost of ammo both reloading and certainly factory ammo. The .223 is a varmint cal. that can double as a target cal. including long range with the fast twist and very long bullets, factory ammo for varmints and playing around is comparatively inexpensive as is reloading, barrel wear should be less as would noise/blast and recoil. The .223 is not a big game cartridge, regardless of what some on here say. So, two very diff. cart. for very diff. purposes.