I have been using a single stage reloader for a few years now - various pistol and small rifle cartridges. I am rather particular about consistent weights of powder charges and weigh each charge with an electronic scale. Quite often I will need to adjust the powder charge by one or two tenths to get it right. How accurate are the powder throws using these progressive loaders? It just seems to me to be a real potential problem. I guess it would not matter much if a grain plus or minus did not matter? Please educate me, as I have had zero experience with progressive loaders. Thanks.
It really depends on the powder. Ball powders measure very well while "Flaky" and extruded powders don't, although there are exceptions like Varget.
You have to experiment to find out how reliable a particular powder will be, I have very good results with Winchester 296, H335, and Varget in a Hornady L&L powder measure.
All that said I still measure "Max" loads individually.
