For 1000 rounds of 9mm (I suppose you buy everything from western metal and get free shipping):
38$ for 1000 primers (57$ for 1500)
99$ for 1000 campro bullets 115gr (104$ if you prefer 124gr)
15.50$ for 1/2 pound of titegroup (31$/pound)
Suppose you pick up your own brass (you could get 1000 case for about 30$ on the EE).
So it'll cost you 152.50$ for 1000 rounds, or 182.50$ if you buy 1fired brass. Amounts to 15-18¢ per rounds, plus taxes, which I didn't include because they are different in every province. Cost will be more or less similar if you shop around. So 7.50$ per box of 50 rounds. That's about half the price of retail.
Rule of thumb : the bigger the ammo, the more you save per round.
2nd rule of thumb : the more obscure the ammo, the more you save per round.
For 44magnum, even buying totally new starline brass and dumping it every time would still save money compared to buying factory. For 1000 rounds of 44magnum:
315$ for 1000 new starline case (BSS)
42$ for 1000 CCI LMP primers (xreload)
162$ for 1000 campro bullets (western metal)
120$ for 3 pounds of H110 (LGS)
OR about 46$ for 1.5 pound of titegroup (western metal)
So 1000 rounds of hot 44mag would cost 639$, and 1000 rounds of normal 44mag would cost 565$. So between 57¢ and 64¢ per round, if you trashed your brand new starline brass after each firing. Which would make no sense. A more realistic calculation would be that brass is reloaded 5 times before you dump it, saving 80% on brass, or 252$. Your cost drop to 32¢-39¢.
Your normal, factory-made, store-bought 44magnum are closer to the normal load (titegroup) than to the hot load (H110). 1000 rounds of PMC (average low-cost brand) 44magnum will cost a bit more than 1000$, so savings are in the order of 70%. It means you pay 30% of the retail price. The H110 loads are more or less similar to buffalo bore ammos, which literaly cost an arm and a leg. Wantsall sells them for 50$ a box of 20, which is a whopping 2.50$ per round. Reloading with H110 cost about 15% of the price of buffalo bore.
So, cost compared to retail (give or take a few %):
9mm: 50%
normal 44mag: 30%
hot 44mag : 15%
Since it takes the same amount of time to make a 44magum as it does making a 9mm, it's clear where the savings are. There is a point where you won't save so much, like when you switch from cheap campro bullets to more expensive sierra or barnes bullets for rifles, and norma brass instead of range pickup, the amount you save will drop, but your cost per round should always stay very much below factory, and then the quality of your ammos will surpass the mass-produced. I don't think that's really the point for lever-action fun rifles though.
For 45-70, I'm not so sure, I guess finding brass will be a problem. Buying ammos to get brass gets expensive pretty quickly. Bullets will cost about 50¢ each, primers still 40-42$ per 1000, and powder is about 50-60gr per round (a pound is 7000grains), so 130 rounds/pound, at 40$ a pound, that's 30¢ for powder. Give or take, 85¢ per round + cost of brass for 45-70. I would say about 1$/piece for the brass (western metal shows 19$ for 20 cases of 1Fired, but out of stock). An educated guess would be about 1.85$ per round for the first load, but then you can use your brass more than once after that.
