Thread: Case capacity effects on velocity

The only real way to check volume differences in cases is to measure the volume, not case weight.

Use a digital scale put the case on and tare the weight. Then add water until level with the mouth record the mass. You will need to leave the primer in. If you don't want to use water then a very fine grain powder will work.

The density of brass (134.7grains/cm3) is such that it doesn't take much brass to add up to a few grains in weight.