Lyman told me that 700-x gave their best result in 200 gr lead,
edited: I forgot that was for pistol loads!!
I use a lot of IMR 4227 in 41 Magnum/210 gr, 44 Magnum/430 gr, and my 45 Colt Redhawk/250 gr. Considering what it does to the brass at near compressed loadings, where it performs best, it would never occur to me to use the powder in 44-40.
Both IMR4227, 2400 and a few others, for some reason much to the surprise of folks...is in the manual.
According to the Lyman manual, for the 200gr JHP Speer #4425, The low end IMR4227 gave them the best groups. For the Lyman 427666, SR4756 low end gave the best groups as well as for the Lyman 427098...all Group I loads.
Lyman lists Unique, 2400, IMR4227, Bullseye, 700X AA#2, SR4756, Red Dot and Green Dot pending bullet used.
I have a special Reloder 7/210gr JHC Sierra load (1,403fps) that gave me 17 shots in a 4" group at 100 yards. Another Reloder 7 load (1,373fps) with a 240gr SWC that gave me 20 shots inside a 4" circle at 100 yards. Loads range between 11,000psi to 13,000psi depending on the bullets used.
I have discovered that 40gr of Swiss FFg compressed about .17" in original semi-balloon head cases produce 14,000psi while 40gr of Swiss FFg in modern RP cases with a .21" compression results in 8,843psi...basically 10 shot averages.
Oh wait I forgot, Lyman's 700X gave them the best Universal Receiver accuracy....I was referring to rifle loads. For revolver loads they also list Nitro 100, ZIp, N340 and True Blue