Well if you figure your free time is worth $10.00 per hour how many hours are you willing to invest in reclaiming this free shot? Then how much to build your reclaimer? Gas to and from the club? You end up working and spending more for the free shot than it would cost to buy a few bags to tide you over to better times.
12 AA's and Remington Target shells just $8.00 a box here. The promo loads are still less but not for long. 28 and .410 are $10.00 a box. For the first time in several years it is getting cost effective to reload all gauges again.
Here is a suggestion. Call a few of your old friends that no longer shoot and offer to buy any unused shot and powder that they have. Every club has a few old time or inactive members who have a few bags of old shot that they no longer need. Offer them $25-30.00 a bag and they will gladly sell you all they have. I did this years ago when shot went up to $20.00 a bag and was able to buy shot for about two thirds the then current price and everyone was happy to sell all they had.