More of a lathe project, put turning down a bullet with a threaded brass head on it and maybe a brass round insert in the bottom would be cool. Being a milling machine you can obviously do things much more impressive. I gather your on about making these kinda things rather than moulds as kinda show pieces, or am I getting the wrong end of the stick. I set injections moulds (put em in and set machine, election and cores etc) for a living and have done blow moulds. All the injection tools are steel though, VERY heavy lol.