It may be useful to look at a powder burn rate chart, I tried to attach one but failed. Since components are scarce, anything near a known load is worth considering. In the case of 7625, you have universal (not currently made) unique and 20/28 as well as some others which arent known shotgun powders. Since green dot proved too hot for 7/8 in a 16 with your components, I would guess extra light would be even worse but thats just going by the chart.
|