advantages to loading off frame
I developed my loader with the express purpose of increasing the accuracy of my Old Army. I had tried the other loaders out there, but they all had one shortcoming, repeatability. I did my share of reloading and wanted to bring that same consistency to the loading bench. I could control the powder charge and even weigh each bullet, but to seat each bullet to the same depth in the cylinder chamber was a variable and subjective to "feel".
With The Triple P loader, I know that each time I lower the loading lever, it's seating the ball/bullet to the same depth every time, consistency at the loading bench directly effects accuracy at the firing line. Sure it's a bit more time consuming to load off frame, but as previous posters have mentioned, it gives one the opportunity to clean the firearm before shooting again, which also effects the accuracy of a firearm over prolonged periods of shooting.