I shoot 19 grains of 4198 with 52's in my dueces.
of the powders listed I bet 335 will give you the best speeds and accuracy inthe 223. I'd try between 25 and 26 grains.
It would be well worth picking up some benchmark and trying it. In my 223 normals and AI I have found nothing better with bullets 60 grains and under. Plus benchmark doesn't have the temp. issues 335 does
You experience mirrors mine...19 grains of 4198 is my go to load in the deuce with 50 grainers.
And yeah, H335 gives me the speed...and the temp issues....
