Upon going back and re-reading a couple articles on the 44 Spl., I noted that the 8.0grs of Power Pistol with the 250gr Keith bullet (RCBS, Lyman, H&G, etc.) is under 15,500psi and gives about 1000fps. Quite an impressive load. Definitely one of those "THE LOAD" combinations which have been identified in several calibers, IMO.
95%+ of the time, I will be shooting 6.0grs of W231 with a 225gr RNFP, which is almost identical to a 45ACP load's power. It will be the range, small game, self-defense (with a HP added) load. The other 5% or less, I will have some of my 267gr Hvy. Keith SWCs loaded with an 1100-1200fps load, probably 2400 or AA#9.
I think the point of the information is just to know with some certainty what the limits are with these pistols. It's good to know exactly where you are at and that you are within the boundaries...