Is silver that much softer than lead? I mean, you wouldn't need to make the ENTIRE bullet out of silver, just replace the lead core of a normal copper-cased bullet with silver. I know that silver melts at a much higher temperature than lead and would need steel or iron molds instead of aluminum, but that's a matter of gear as opposed to skill.
Hey, I don't know the exact details. This was me looking up silver bullets on the internet for fun months ago on a whim. If there were actual werewolves and I needed them for that then I'd remember better! All I remember is that it requires different tools, suitable for making jewelry out of precious metals, and is harder to do right compared to what people normally use to make homemade bullets.
Maybe it is a casting thing vs. the swaging that Joseph is talking about.
And I just checked, lead is not nearly as hard as silver, but silver is very comparable to gold. Melting point and hardness do not necessarily relate, as melting point is more about just bond strength and hardness also has to do with the crystalline structure.