This might help:
You might want to take a second look at brass costs. Last time I bought brass, it was 60 for a 1000 once fired range pickups. This was to get things going. Since that time, range pickups have increased my supply as well. You will also need to account for the fact that brass is a multi-use item, and even if you bought NIB brass at full retail, it get cheaper every time it's used.
I was also going to tell you to look at cast bullets, then I remembered the issue with Glocks. Get an aftermarket barrel and you can save a fair bit there as well. But only you can determine if it's worth it to you.
Bulk orders of primers will save you money too.
The attached pic is what I came up with:
Powder: Unique Local price, 1 lb.
Primers: CCI or federal, local retail prices, last time I looked.
Bullets; Montana Gold 155 gr
Brass, Bulk once fired last time I bought any.
Cheaper than $.33per round. Still room for improvement though.
Hope this helps.