Tin alone in pure lead does not harden bullets. 2-3% tin will make casting a lot easier, the mold fills out better when tin is present. Tin and antimony in pure lead will harden more. Arsenic added in will allow the bullet to be hardened by tempering or quenching in cold water. Arsenic can be obtained in common shotgun shot bought for reloading.
Range lead can never be assumed to be pure. Some jacketed bullets may have a bit of tin and antimony added to control expansion.
The more people I meet, the more I love my dog
They're going to get their butts kicked over there this election. How come people can't spell and use words correctly?