You forgot .32 S&W and .32 S&W long, or maybe .32 long colt. the only available ammo for them is lead round nose. As for anything being "THE" ammo for any caliber, ask ten different gun nuts and we (I'm one) will give you ten different answers usually with semi valid reasons for each. In my oppinion the best ammo is first reliable, and second accurate. Everything else is secondary. As for Winchester Silvertips the only .32 they are available in is .32 ACP (automatic colt pistol)and not revolver ammo. There was talk that they were going to load .32 magnum with them but I don't believe it ever happened.

Take Care and Stay Safe