I don't understand why BANDOLERO! has an exclamation point at the end. BANDOLERO!? seems more appropriate considering the unusual casting of Jimmy Stewart and Dean Martin as brothers.
If you're watching BANDOLERO! you're checking it out because of the cast. Add in George Kennedy and Raquel Welch... because who doesn't want to watch a western with that cast? When I came across the film a few months ago I was flabbergasted that I could have overlooked something like this.
But if we're being honest, Dean Martin isn't playing on the Dean Martin personality, and Racquel Welch is just eye candy with a terrible accent here. George Kennedy chews his scenery and Jimmy Stewart plays terrifically against type as moralizing cad, but a cad nonetheless. Stewart gets the juicy lines and the best scenes.
Not top tier, but good fun. Essential viewing for Jimmy Stewart fans.