Not very convincing western, with standard acting from its cast, "Charro!" has a constant homoerotic undercurrent that has been overlooked by almost everybody, not to mention the incestuous tone of the relationship between two villainous brothers. Its real problem is the credibility of the situation (and I do not know much about ballistics), related to a valuable historic cannon that has been stolen from the Mexican army. Presley is framed as the thief and he must clear his name. In the cast, Solomon Sturges (son of famous director Preston Sturges), maybe not a bad actor, overdoes all the scenes he is in (no wonder he had a brief career); Tony Young does a clichéd Latino impersonation, and Ina Balin is as misused as usual.
