Thanks for getting back to me - Kenny (Eagle Eye shooting) has used this bullet made in Zinc. He did use Winchester 231 and has loaded it up from 5.0grns to 6.0grns the best accuracy was 5.3grns out of a 9mm pistol, with no signs of pressure issues. Now if you look at the powder charts Green dot is almost the same as Winchester WSH. I am currently loading 4gns of WSH in my 124grn lead 9mm loads and they are shooting great and accurate. Hope this helps in coming up with more/better data for the WSH powder. Also I am shooting this out of the Ruger PC in 9mm, not in a pistol.
As for casting with Zinc have great success. 1) you need steel molds 2) you can not use most bottom pour pots made today as the zinc will eat thru it. I found on Ebay the old saeco pot and the old lyman pot which is the same - bought a few of them and restored them. 3) you can ladle pour from a cast iron pot but it is a pain. 4) The zinc has to be around 820 degrees. 5) Zinc needs to be water quenched or it will grow in size when it cools slowly which will make it a bitch to resize. 6) all my Zinc is from wheel weights which the junk yard I get my wheel weighs charges me 30 cents a pound for mixed so I get maybe 20% lead 70% zinc and 10% steel.
Oh one more thing to get the weight of your zinc bullet multiply the lead bullet weight by .6 it will be close 147 x .6 = 88.2 but they weigh in from 89.8 to 90.4 at least that is what I get.
I do have a small channel on you tube and you can see me casting in zing and sizing.
Thanks for any info you can give me - I was thinking around 5grns of WSH