Clip on wheel weight work just fine for patched round ball rifles. They also work well for revolvers if you use a loading press. I have been using them since 1978 with no ill effects to the cylinders or barrels. However, if loaded in a revolver on the gun, it is a strain on the Colt type arbor (I loosened one in a steel framed ASM 1860, since repaired) and a strain on the rammer screws themselves. Bottom line is it is NOT taboo to use clip on wheel weights as others have alleged, if you do it sensibly!