How about this:
I can ship you shot, you can ship me muffins?
Do you have a 175 foot tall tower to drip lead from to make shot?
I can buy shot where I am in 25# bags. I reloaded all the shotgun hulls I had, and melted down a couple of bags for my pistol boolits. I have another one in reserve.
It's magnum shot. Which means it is harder than regular shot, higher antimony.
Last go-round I got 100# of 7.5 size.
Also, if interested, I have a Lee lead tester and could do an informal test for you, if you'd like.
The shot tested out at 11.8-12.1 (air cooled-water dropped) initially cast. I haven't bothered to retest. (for example)
You are welcome to PM me if interested in swapping around.