They seem to shoot better groups to me and they are easier to clean.
So far have not had a hint of leading in any of the rifles.
In the 357/38spl rifles they are real good i like to load the 158 semi wadcutter.
Even made up some sub sonic for the Brother in laws new rifle with he had fitted with a suppressor and he loves those loads.
I just run a wet patch maybe a brush then clean patches till dry and have not seen any fouling.
I shot some blackpowder loads in my 45-70 and that rifle looked like it was never shot.
I like it.