Go bigger than 0.356". Probably the biggest issue with cast in 9mm is bullets are often too small. I run 0.357" in all my 9mm guns, 124-160gr. I never get tumbling or poor accuracy, coated or lubed. I know guys that run 0.358", but with mixed brass in some guns, you are going to get fit issues. Plus I shun TG for lead bullets, but I am probably in the minority there.