Well, you would reload the Federal brass, but then it's a handload and not a factory load. So, if you are comparing reloading cost to factory load cost, you can't really do that.
If looking at the original premise
"For funzies, just approximated the current cost to buy components for 450 308 target rounds using sierra 168 hpbt. Including using the brass bout 4 times, cheaper to just buy boxes of Fed 168 hpbt match, and then get the brass"
So politely, yes i can do that. And the number of reloads from each cancels itself out. Nothing was said about only using factory rounds forever. Just 450 rounds was specified. And it was also specified "then get the brass", which implies reloading in the future.
Certainly if you count in the number of reloads gotten from the brass brought separately, it significantly reduces the cost over buying new brass every time. But that was not the premise. And if the premise was changed to reload past the original comparison, it would have to include reloading the brass from the factory rounds.
And while shipping charges were not included, Graph and Sons does not go by weight, unless referring too the weight limit they put on one haz package. Graphs does not indicate ammo has a haz fee, unless shipped by air.
One of the reasons am ordering bulk bullets/supplies from Graphs.
And after looking it appears PV also doesn't usually go by weight, but mainly by price of the order.
And while not specified, these are general loads to be used in a variety guns including various semis. They are only used for about 4 reloads. When loading for a target bolt specifically and separately, the brass lasts much longer.