I might be able to swing a deal today to get a pre-owned, but never fired S&W 325 Night Guard. Looks brand new. Its a .45 ACP six shooter, and uses moon-clips. My question is, would I be able to shoot .45 GAP from it? Seems like I would be able to, since you can shoot .40 out of the 10mm version of this gun......I ask this because I love modularity; the idea of being able to shoot two calibers from one gun without changing anything is very, very appealing to me, such as shooting .38 SPL from my .357 Mag SP101. Another question, if I were to buy this pre-owned S&W 325, would the warranty still cover the weapon even though I'm not the original owner?