I use it in hopes of prolonged barrel life in 6mm and others where I use double-based powder.
The problem being how can you measure that with any degree of 'science'?
For certain your barrel will not foul anywhere near as much as with bare bullets and I see no cold bore shots but on this latter point many believe its a 'cold shooter' issue!
It is very easy to apply without mess and a tiny bit goes a very long way.