VV N330 is a great substitute for unique and seems to be insensitive to case fill or fill position.
I started with 14 grains and it was a little slow at 980 fps, loaded some at 14.5 and I'm getting a consistent 1020 fps. At my elevation the sound barrier is 1080 fps, so I'm comfortably below that and decided to stay at the 14.5 of N330
I'm shooting a 400gr Speer jacketed soft point over 14.5gr VV N330 in starline brass with win lrp out of a marlin 1895G
And a SilencerCo hybrid 46.
Subs out of a 45-70 are a whole lot of fun
If you have any more 45-70 subsonic loads post them here
I started with 14 grains and it was a little slow at 980 fps, loaded some at 14.5 and I'm getting a consistent 1020 fps. At my elevation the sound barrier is 1080 fps, so I'm comfortably below that and decided to stay at the 14.5 of N330
I'm shooting a 400gr Speer jacketed soft point over 14.5gr VV N330 in starline brass with win lrp out of a marlin 1895G
And a SilencerCo hybrid 46.
Subs out of a 45-70 are a whole lot of fun
If you have any more 45-70 subsonic loads post them here