I agree, the .22lr (or match) would be a priority. Ain't nuthin cheaper, nor easier to shoot. Then, depending on your personal taste, a .357 Mag. (or MAX!), or the .44 Mag. (or .445 Super Mag). The ones in parenthesis will be more costly to shoot and reload for, but give a commensurate higher level of performance. And, all can be shot without a scope, but still have the range to use one, should you decide you need one, later on..........................Bug.