Barnes also makes a 200grain copper .429 cal bullet, or used to. Look around for any lighter copper bullet; it should also be shorter than the 225.
Those 200gr XPB shoot pretty well out of my old man's older 1-38 twist 444 Marlin.
I've not used them in 44, but I'm a big fan of the Lehigh 95 grain XD through my Henry 327 carbine. Chronoed 1730fps at the muzzle with Alliant 2400 they'll touch holes at 50, and they do some nasty work on water jugs and wet paper. Haven't shot any game with them yet, but I wouldn't hesitate to plug something up to deer size at short range with it.