Unique will work in subsonic

[ReAX222]

I decided to try it since I couldn't find any information. M1Sales upper on a RRA lower, will cycle my regular load of 4227 w/ a 220gr SMK. I don't have a crony so take the info for what your paying for it.

LC 223 brass resized, CCI small rifle primers, 220 SMK.
First I tried 4.0 grains of unique, no pressure signs on the case, bullet was slow but cleared the barrel. Then I tried one at 5.0 grains of unique, much faster, a little more noise and some recoil, the primer started to flatten out. At no time did the action move. For a bolt gun this round could be a lot of fun, I'm louder in the wood shop than when I was experimenting.

Just putting it out there Unique will work, just not for what I want.