655C is the only bronze that should be forged with health in mind. The lead content as noted above is about .2%-.5%. Any other bronzes will have higher lead count in them.
As noted above as well, Even a propane barbque will melt this bronze into a hott puddle on the floor of your forge. Orange is way too hot. If it gets this hot let it cool to dark red before attempting to blink. I tried working 2 pieces in the propane forge and found that I did not feel like a PRO, but did feel the PANE. One at a time! I just bought 5/8" round and it is about $11 a foot.