I bet they would be lighter and look better. Only reason so far shooting 158 gr is thats what I have reloaded. Sights on my other Ruger shoots good with it. To make the gun useful for me I'll have to shoot a different load.
I have have a recently made P345. I have 600 rds with mine and no cleaning. I have used Ruger mags exclusively. My only complaint is the sloppy single action trigger. Ive used 230 gr FMJ.