The 120-123 class won’t group what is going on

[Kosh65]

You might want to try the H4895. Other than the Lvr and CFE………..the other powders that you have listed (IMO) are probably a bit too fast burning for the 123 class pills.
I also would start @ .020” off the lands and work back from there @ .002” increments.
Do you have the room to shoot greater distances? The longer boat tail bullets can be finicky to stabilize (compared to flat based) @ shorter distances.