Have used it for a number of years now. Fill to the base of the bullet with no more than light compression, and it will deliver consistant velocity and minimal, nom cumulative fouling. Velocity will be close to the standard spec for the caliber. Or a .38 spl 150 grainer will be around 800 fps. Standard primers and moderate crimp. Clean with plain water and oil as normal. Cases dropped in plain water will be clean and ready to load after drying. You will need to use bp lubed bullets for best results.