I am running one pretty close to yours.
Fed top gun plastic base wad
33 steel powder
5/8 steel B-2
1/2 tss 7-9
Tested average 1423fps
I have shot a lot of B X 7 at geese and they worked just fine Aprox 143 pellets
friend is running another load using gold metal and sam 1 with 1.25 and shooting a 2X9 and crushing everything.
Got a few things to have tested this coming summer. Just need Alliant to put some Steel powder on the market getting a little low.
You’re not the only one nervously watching the STEEL bottles disappear.