Some of the combinations you mentioned could be almost 2 bucks a round. That's fairly high for reloading isn't it? I mean if you are competition shooting I can see why but just target/ Hunting ammo I can't see it. Not when I can get sun MOA of the shelf and for a buck a round. Don't get me wrong here. I believe you are right on prices and variances but if he is not comp shooting he really needs to watch his P's and Q's if he wants to save on run of the mill target ammo.Price for loading can and will vary a lot depending upon what combinations you are shooting. But here's an easy way to figure it out.
Components:
Primers- typically $75-120/thousand if you are buying now. Higher price if you want match primers, lower price for standard. Large rifle is probably still the hardest of the primers to find right now. Anything under $75/thousand is a good price now on LRP.
Powder- 4064, Varget, TAC are all good choices. 1 pound = 7000grains. Most of the better 308 powders are $40-50/pound these days. Typical loads are 40-45gr of powder, so roughly 150-175 rounds per pound of powder. If you want less expensive but still decent performance and not too hard to find, check out Shooters World powders. See what might be best for your weight bullets (typically some powders will work better for the 150gr range, others better for the 175/180gr range).
Bullets- this is where the difference in prices really show- if you can buy in bulk that's the best bet but a big difference between 147-150 gr FMJ vs 175gr HPBT/SMK. Best price will be blem 147gr FMJ bullets. Check Rocky Mountain Reloading, MidSouth, or there are a few places that sell mil spec "demilled" parts. Pats, Bartlett, etc.
Brass- again, big differences here. Bulk LC brass isn't too bad to use and actually is good brass with a little prep work. Or you can buy Lapua if you are shooting precision. $.25 a case for LC vs $1.00 per case for Lapua. Find a good source for once fired Lake City and you are set.