Charter Arms offers its .40 S&W chambering followed by the .45ACP and 9x19 mm Parabellum (the 9mm Parabellum revolver will also chamber factory .380ACP). All three of Charter Arms' Rimless Revolvers (9mm, .40 and .45) are rated for higher velocity +P loadings. The average gun owner can own a trouble-free revolver chambered in popular semi-auto rounds without the need for specialized ammunition clips and a specialized gun. As a primary self-defense carry gun, these three calibers mean reliable protection in popular semi-auto self defense-calibers. If more power is needed, step up to +P ammo. The advantage with Charter Arms Rimless Revolvers is they will fire any mix of cartridges while maintaining reliability. For plinking with .45ACP or 9mm surplus and discounted military type ammo, the affordable Charter Arms Rimless Revolver is economical and also a .380 revolver.