CraigC
Sixgun Nut
My numbers come off two different postal scales and have been verified through several sources. Sorry but there's no way your .357 is 34oz. It's got to be at least 38oz. My 6½" Old Model is 41oz.
In factory ammo, the .45Colt has an advantage. It changes for the handloader. In these platforms, the .44Spl has the advantage and is the better choice. It's more efficient and due to greater cylinder strength, can be loaded 100-200fps faster with less powder. Whereas the .45Colt is limited to 21-22,000psi and is a lot of wasted powder capacity.As far as "power" where is 44 spl compared to 45 colt?
The difference might be an ounce. Certainly no more than that.For example with two identical New Model Vaqueros the .44Spl version SHOULD weigh a couple of ounces more due to the slightly smaller bore in the cylinder chambers and barrel.