You do not need my approval or advice.Its your money,your rifle,and your time.
For myself,cost is not the #1 consideration. With my AR's,I build more for accuracy.Barrels have a lifespan.I don't do budda-budda-budda mag dumps.I shoot one round at a time.I almost always use match grade heavy bullets,loaded for my intentions.I shoot the same ammo,every time,not what is on the shelf.
A while back,Ibought a 5 gal bucket of one fired(3750,approx) for $159 delivered.Its about $199 now.
But I'll call it 3000 for $150,or 5 cents apiece.Maybe I can load them 4 times.
So,under 2 cents apiece for brass,per load,rounding up.
Primer: You can always get the CCI Mil-Spec primer(recommended) for under $50 a thousand.On the high side,5 cents for a primer
Powder:,about 280 loads a pound,+ or - .To make the math easy,say $28 a pound,or a dime for powder.
Now,at this point,we spent 17 cents,and we need a bullet.
Its easy to buy 55 gr to 62 gr Hornady fmj for about 12 cents a bullet.
The 69,70,75,77 gr HPBT match bullets run 23 to 28 cents apiece,callit 25 cents.
So,for 55-62 gr fmj ammo that will likely be more accurate than commercial mil-spec,about 29 cents a shot.
For match grade bullets,42cents a shot.
If you buy new commercial brass...what is it now? $35 a hundred?Load it 5 times?That adds a nickel a shot to those numbers.
But then,ammortize the Dillon,case prep tools,etc...and figure your time.