The RA 90 is my reef gun of choice. Two bands provide plenty of power for most fish up to 20 lb. Have you tired putting longer band on your gun since you’re having problems loading the stock bands. Most people can’t load my RA 120 with a single 20 mil band. The only way of loading it is, get both hands on the bands, put the but on your chest, and tuck the tip of the gun under your fins to keep it from moving around, then pull with your back. Its easy once you get the gun under a fin.