Starline lists their 30-06 brass at 48 cents + shipping for 250 cases, (223 at 29 cents). Powder 50 grains per load is 140 load per pound if I'm correct, that's 39 cents per load + shipping, 13 cents for a primer. That's a buck + shipping per round for 30-06. If I buy at 1.45 per piece and reload at 1.00 + shipping on both and only shoot 100 rounds a year that's a lousy $45. Quite frankly not worth 1/2 hour of my time. My 8MM Mauser is about the same cost wise but I do shoot it more.That's a lot more than 10-15c savings per round.
A quick calculation shows the following 30-06 handload costs with your bullets assuming you have to buy brass:
Interlock- $20/box vs $28+ shipping. That's over $0.50 savings per round vs store bought. About 33% savings.
$0.35 Bullet Interlock
$0.13 Primer CCI
$0.40 Powder Varget
$0.11 Brass Starline
Premium- $25/box vs $50-$75??+ shipping. That's anywhere from $1.25 to $2.50 savings per round vs store bought. 50% to 75% savings.
The quality of factory rifles and ammo has indeed improved, but reloading in bulk quantities and frugal shopping still offers significant savings.
For something like 223 Hornady Black 75gr BTHP or Federal Gold Medal 77gr OTM it's $25-$30/box retail vs $17 for handloads, over 33% to 50% savings:
$0.50 berger 75gr VLD ($0.40 Sierra MatchKing)
$0.13 Primer CCI
$0.18 Powder Varget
$0.07 Brass Starline
If I apply the math to my 6MM Remington, (I shoot that more) but I can save a great deal, the cost of loading is less than 1/2 of the $2.25 per round from the factory. Saving maybe $250 a year so maybe or maybe not worth it. However, accuracy and velocity make it worth it.
My 444 Marlin cost from the factory $2.70 per round, I can load that for far less but it only gets shot 10 to 20 times a year. There's barley $25 savings.
My 450 Marlin 500 grain loads can't be bought at any price. So handloading it is.
My 359 Norma are $7.59 per round, and I can load them for well under $2.00, again I only shoot those 100 times a year, saving $500, worth my while. However, that throat is custom cut so handloads it is.
All my custom stuff I'll have to hand load for but, I'm going to load for fewer cartridges, shoot more wildlife photography and work on those grandkids. My 6MM ARC for my gas rifle I believe will eat only factory ammo, as will my A2 in 5.56.