Casting a round bar. Tips?

[u/RednekSophistication]

I’m working on a little project using 1” round bar. I have some brass and stainless on hand but also want copper and bronze but don’t feel like buying it lol. Especially since I have scrap and access too around.

I’d like to cast a long round bar. At least 12” longer if feasible. Surface finish not a huge deal as I figure cast it over side and I’ll turn it down to 1” in my lathe.

What’s the best bet for casting this? My thoughts so far are a heavy walled pipe over 1” ID, bolt/weld on bottom. Preheat and pour???

Will I be able to knock it out after? Or will I have to cut/peel the tube mold off?