Been reloading for decades for a 742 and more recently for 7400. My favorite bullet is 150gr soft point or bronze point. My favorite powders are 4064 and 4350 loaded a grain or two below max. With full length resized cases I can get 1 to 1.5 in groups at 100yds. As for your question of cost, do the math. 150gr bullet about 11cents, 45gr powder about 17cents, primer about 2cents, assume no cost on cases, reloading equipment, time, etc. Cost per round 3006 is about 30 cents. and the pleasure of having a possible better round than you can buy.
best, nrb