I own pairs of "Original" Vaqueros in .357, .44 mag & .45LC. My choice is generally the pair that are the most accurate. In my case its the .44's and my rifle is a Uberti M73 Carbine in .45LC. All my .44 has a blue felt marker stripe across the base, my .45 LC has a red stripe. Never got the wrong ammo in the wrong gun.