Have indeed heard the newer Pyrodex ignites a lot easier, but mightly resent being forced to find out -- especially since state bureaucrats have forced the closure of ALL the informal shooting ranges that formerly abounded in Western Washington. (Even with cartridge arms, attempting serious load development at a formal shooting range is absolutely the most frustrating firearms-related chore I know of. Because of all the regulations and interruptions for cease-fires etc., success at it requires literally weeks of snail-paced efforts. Not to mention being prohibitively expensive due to range fees.)
Moreover, published results show there's still a significant velocity loss with Pyrodex. This may not matter much in rifles, but it is absolutely ruinous in revolvers, especially the Ruger Old Army: the difference between 1160 fps obtainable with 41 grs. FFFFg and a .457 ball versus no more than about 900 fps with Pyrodex P; the difference between about 950 fps with 36 grs. FFFFg and a 220 gr. conical versus no more than 700 fps with Pyrodex. This radically downsizes energy: with the ball load, a difference of more than 400 foot pounds for FFFFg versus less than 250 foot pounds with Pyrodex; shooting the conical, a difference of about 450 foot pounds with FFFFg versus less than 235 foot pounds with Pyrodex. (My FFFFg figures are all from a chronograph; the Pyrodex figures are from memory, mostly decades of NRA technical division stuff.)
In other words, Pyrodex turns a potent, dragoon-class .44 into something less than a puny .38 Special (if even that), making it worse than useless for any self-defense or animal-emergency purpose, a vital consideration in bear, cougar and outlaw country. (My FFFFg figures are all from a chronograph.)
Also I've heard that with the Rugers there are severe accuracy problems using Pyrodex. This is no doubt a byproduct of the radical velocity reductions: Rugers typically shoot their very best with maximum-velocity loads. (This is absolutely true of mine, which are 1980s vintage, early stainless guns with the serrated triggers: 25-yard, off-the-sandbags groups well under two inches with either ball or conical, but only with max loads.)