Wheel weights: Walmart parking lot, nighttime, pliers and a bucket.
If local scrounging doesn't work there's always eBay and the classifieds of cast bullet forums.
Got plenty of wheelweight metal and monotype.
I shoot a lot of roundballs in a flintlock and my one son likes soft lead in his 1858 cap & ball, and we are running low. Besides, I need to dilute some of that monotype to make use of it.
