You will be very happy with the new Vaqueros. Tolerances are much better than the old Vaqueros. Really, they are built on .357 mag size frames so if you go with the .45 Colt you will be limited to 20k psi and around 270 to 280 grain bullets (shorter cylinder). For what you intend to use it for, a 255 grain SWC at around 950 fps will do just about anything a gun can do anyway. I have had both new and old Vaqueros and the new ones are fantastic.
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