.. The caliber has been around since just after Noah stepped ashore. It was one of the first, if not the first, metallic cartridge that offered the option of being used in a revolver or a rifle. A definite logistical advantage for Pioneers moving across the American West. and settling on the Frontier. That being said any factory ammunition will be loaded light to accommodate ORIGINAL Firearm's that may be over 100 years old. And then, there's possible differences in bore dimensions. ..... It can be reloaded stiffer, BUT, the cases tend to be thin walled, and unless one uses modern brass ( Starline etc.) then they tend to collapse when resizing.And even then extra care needs to be taken. ..... My Reloading Manuals, perhaps not the most up to date, admittedly, but none show specifically, "Hotter loads" for either Rifles nor, modern handguns. ..... Without a doubt others, with more first hand experience, will chime in with specific load data, and recommendation's for "replica" SAA Revolvers by brand. ....... Interesting historical cartridge though ! ..... David K