Reloading savings is always a numbers game. The advantages are in buying the components in large bulk quantities at good discounts and the re-usability of the brass. .40 S&W in an unsupported chamber will have a shorter useful life than some other cartridges, but still allows for some careful reforming and reloading. Buying components to load 10-500 rounds at a time will not be as cost effective as buying enough components to load 1000+ rounds, so stock up.
Kalashnikov Klub #734 ; SNS #734 ; Rimfire Club #734