While we manufacture a full line of case length gauges for handgun cartridges, it is not normally necessary to trim handgun cases. These are made for those who are very concerned about overall case length with their handgun cartridges. If you are using light to moderate loads, generally the case will wear out before it needs to be trimmed. If you are using heavy loads or are a person who demands absolute uniformity, the handgun case length gauge would be applicable for you.