I just went and grabbed Lyman #4 Cast Bullet Manual.
They list a 250 gr bullet with their alloy #2 (15BHN) with 2400 a min of 17.4 to Max 19.2 in the 44 Mag
The 240 grain bullet of linotype (harder 22 BHN) list even higher loads.
You can use the next higher bullet weight and just get higher velocity.
I would use the lower of the 250 gr bullet 17.4 grs. But that's me.
You load what you think is best, I am not responsible, just ask my wife