I have used both silver bearing (3-1/2%) and non-leaded solders---made by
Harris. I highly recommend them over the others, especially Oatey, which I
found to fill and run poorly.

I found that I can get an acceptable joint with the Oatey stuff with
silver in it, but their tin-antimony no-lead stuff works too hot for a
regular propane torch (it might be fine with acetylene, it's not been
worth my time to find out).
--Glenn Lyford