After doing various research, I've pretty much decided to go with H335 for my new #10 .223. It was a tossup between this and H4895, but I really like the way the ball powders meter.

Factory website data shows a max load of 25.3 = 3203fps = 49,300 cup
My old Speer manual shows a max of 27.0 = 3193, (no pressure data)
That's a huge difference in charge weight to get the same velocity. Speer manual uses a Mini14, 18.5" barrel @1:10 twist.
Barrel info is not given on the Hodgdon Data Center website.

I hate when we get conflicting data, and being new to this powder, I thought I'd ask you guys.
Intended bullet is 55gr.

I'd appreciate any comments from someone using H335.