I used to sell quite a few 230 gr molds, and will still make them. No one ever complained of accuracy, yet, I felt it a bit light for best performance on live targets, so stopped the listed weights in my catalog at 240 grains, I believe.
Perhaps what 'I felt' regarding minimum bullet weight is getting too close to theory though! The old 44-40, use bullets of 200 gr, and not many user complained of it's killing power. I've made quite a few 200 gr 44-40 molds and don't recommend heavier for them. So perhaps I should put no limit on the 44 mag or speical. I'll make any weight asked for, down to 200 gr. Lighter than that and accuracy will suffer.