Anyone tried H4198 or H322?

[RobRat]

I'm looking for a slower powder to solve a short stroking issue. I haven't been able to get any AA1680, but looking at the burn charts H4198 and H322are close to a # of powders that are on published data:

#44 Alliant 2400
#45 AA #9
#47 VN110*
#48 Lil gun
#49 H110**
#50 Win 296*
#51 IMR4227**
#52 H4227**
#54 AA1680
#58 H4198**
#59 VN120
#60 H322**
#61 AA 2015BR
#63 IMR 3031**
#64 VN130
#64 H Benchmark
#65 H335**

*= Powders I've tried (& didn't cycle subsonic)
**=Powders I have on stock

Looking to be subsonic with a 200 gr SMK, 16.5" AR15 upper, gas block in the Pistol position. What powders have you tried, range of weights, and any notes. dirty, inconsistent, worked great, poor accuracy, etc.