The general consensus seems to be that a load of around 75% of the usual 30gr or so would help prolong the safe working life of your brass-framed .44. However, bearing in mind that the Remington has a solid frame and is built like a brick outhouse, the time when you, as an average shooter, can expect to see signs of stretching probably falls outside your natural lifespan.
My buddy Alan is still shooting his brass-framed 'Colt' Navy in .44cal that I sold him back in 1984. With 25gr of T7. It is still about as tight as I remember it back then.
Remember that in general we as shooters are not trying to alter the landscape behind the target, just to shoot accurately and comfortably, something that is easy to do with around 25gr of whatever - somewhat less for Swiss schtuff, though.
tac