So my 3 bullets don't care how fast they go nor what the twist rate is as long as the lands get a bite and the bullit gets out of the bbl with enough spin to get stable?

Shape has no real bearing on flight untill way after a small caliber
cast bullet is done flying.

So if the bullet length jives with twist rate and shape doesn't matter an "X"(TSX,GMX)shaped bullet gaschecked or plain based fitted properly with old fashioned powders ,as opposed to modern, should deliver equal TO target performance to the cup and core or copper cousins of the same BC and SD ? Please note to target not target performance.