I think there are some miscalculations going on here. Happy to be corrected but:
500 grams = 7716 grains ( bottle of powder )
A middle of the road load for a 125gr bullet using AP-70 is 4 grains. ( I use 3.9 in my 1911 with cast bullets )
7716 / 4 = 1929 loads per bottle
So, $60/1929 = 0.03 ( 3 cents per shot ) not .07c. While it's still not a lot, it does add up.
The cost I used for bullets was based on the Tigershark ones , ( which I've used ), which run at about $147/1000 with some shipping.
Going on Sarcos figures above, with cheaper bullets,his costs are 19.7 cents per round not 16.
Not having a go at anyone, just trying to keep my OCD in check.
Still, when all is said and done, yes, you can load cheaper than factory ammo.
If you are currently firing 300 rounds/week, you should have a good supply of brass already. ( Or have you not been collecting it? )
New, unprimed brass is somewhere around 20+ cents, so if you haven't been collecting your brass so far, it would be cheaper to keep firing those 32 cent/round factories until you get enough for your requirements.
Costs can be kept down by using cheaper components or buying in bulk or grabbing specials when available.
as has been said.
Note: Every pistol range I have shot at has a ban on FMJ bullets, ( NSW ), so maybe check before buying up in bulk.