One of the main points about shooting Lead bullets well through your revolver (or any gun) without Leading problems is to slug your bore, then to shoot bullets that are sized at least .001" larger than the bore.
True Leading is caused when hot gases are able to blow by the side of the bullet and actually MELT Lead as they do.
Pure Lead (which you typically won't be shooting in a centerfire .44 at any speedy velocity) has the HIGHEST Melting Point.
As you add Tin and Antimony, which are hardeners for making Lead bullets, you actually LOWER the temperature the alloy melts at.
This isn't a problem as long as the bullets seal well in the bore.
Typically using powders such as Unique, 231, HP38 (same as 231) and a few others make good "Mid-Range" (mid-velocity) loads that are pretty pleasant to shoot.