I swore I read something on here once about letting them roll around in some form of container.
Yes Sir, Put them in an old cast irom frying pan, put that on the floor of your trunk and just drive around. Won't hurt a thing but the balls do look different. ..
By the way, when I run my lead, I always roll test and weigh my balls. My casting pot is an older one and I get many rejects. ...
Be Safe !!!