If I were competing in BR I'd at least test a nose pour mold, you never leave anything on the table when it comes to accuracy and test for the best compbination.
But, if you're talking factory rifles and handguns, I'd say in my experience I haven't seen a good base pour mold leaving anything on the table in terms of accuracy. I've shot moa 100 yd groups with rifles and handguns, and those with bullets cast from a quality multi cavity base pour mold. The key is not the mold, the key is the consistency with which you cast your bullets, and inspecting them to cull the defects.
