I was able to match very consistent low pressure (~7k) 1oz loads using either WinAA or Rem (STS, Nitro, Gun-club) hulls with either SR7625 or International clays. Loads were found in Lyman #4 Shotshell book. They used win-Lite 1oz wads (or clones).
I was also able to do similar 7/8 oz 20g loads in Rem STS or WinAA hulls with same powders from same loading source.
Win or Rem 209 primers worked with little difference in pressure.
The Intl Clays load would actually cycle a Beretta Auto 391 although the 7625 wouldn't.
I imagine that Hodgden could supply lower pressure loads such as what you want.
Green dot has a similar burn rate and flexibility but I found it didn't burn completely with these low-pressure/low payload reloads. Birds/clays couldn't tell the difference but it just meant a little more work cleaning the barrels.
