I have managed to scrounge dies for everything and reload, the exception being a 9mm I just got. 9 is absurdly popular right now so there are no deals on dies. Components run nearly as high as factory anyway. I am experimenting using a.38 die with some success.
45-70 is the only thing I have never bought factory ammo. I took one look and decided dies, brass, and bullets came to around $60, when a box of 20 was 35t or 40.