There's reclaimed shot, then there's reclaimed shot. By that I mean that you have to be careful who you get it from. If it's processed, cleaned, tumbled and regraphited, then it's good to use for informal practice in 12 and 20 gauge, but not in smaller gauges, since it tends to clog in the drop tube.
The other reclaimed shot is the stuff that's sifted from the field, but not cleaned. It will be full of dirt, sand and debris, and is hard on your barrel. I use this stuff for casting bullets, where I can skim off the impurities, as it's a good source of antimony.
Just be aware that shot gets deformed when fired the first time, so the reclaimed shot will have lots of dimples and flat spots on the pellets. You'll get a few flyers, but most will fly true. With today's prices, reclaimed shot is a good option for a lot of informal shooting, since it can usually be had for about half the price of new shot.
Hope this helps.
Fred