Everyone here is right, casting is a money saver, you can get really good accuracy, and even if you get really expensive equipment, it will pay for itself is a big hurry. the one thing I will add, is that if you have a firearm that has a different bore, is out dated as far as buying the ammunition for, you can have a mould made by one of the custom makers to produce the bullets for it, the cases can more than likely be made from some other case which is available today.
I cast for six different calibers, use a lot of WW, and have a blast throwing them down range for very little $.
My 45-70 is a large user of WW, at 545gr @. if you can find these to buy, $59 per 50. Home cast, about $4 per 50. Didn't take but one casting session to pay for the new mould and handles.
Indoor ranges will not allow the use of cast bullets in most areas, so they are for outdoor shooting only.
Also you should cast out of doors, keep the kids, pets and others away while you cast, no smoking, drinking eating, or putting your hands to your face, or extremities before a thourgh washing. I say these things as a reminder to all, I have had lead poisoning, still have a lead count which is probably greater by double of anyone on this forum, accept those who work in a smelter where lead is done. Casting is great fun and as was stated earlier, a hobby unto itself. Do it as safely as you can, and enjoy the end product, as you watch the guy next to you spend more on one round, than you spend on a whole box.
Good casting and good shooting!