Lynn, this thread here: https://castboolits.gunloads.com/sho...ed+range+scrap . . .was my contribution to those wondering what's in their range lead.
Unless you're getting a large number of fellow casters frequenting your range, or getting a lot of shotgun pellets mixed in, your primary source metals will be jacketed bullets, which are nearly pure lead with a trace content of antimony (less than 1%). Foster-type shotgun slugs are even closer to pure lead.
When I separated out and smelted a bunch of cast bullets (my rejects and other folks from the berm), it behaved and hardness-tested like common wheelweight or wheelweight plus tin mixes.
You're most likely going to be buying an alloy containing random bits of all that and will probably test between 8-10 BHN when air cooled, that MIGHT water-quench up to 12 or 14. On the plus side, it's local, cleaned up, you aren't paying shipping and it has SOME tin and antimony that will probably make it useful as is for most low to medium intensity pistol loads. On the down side, you've just got my educated guess plus your own local range knowledge as to what it's made of, and when you DO have an application where you need to know what's in your bullet with some degree of precision, it may not serve. Because of those factors, I wouldn't pay over current market value for pure lead.