Hello,
I'm starting to learn how to load 10mm and have run across an issue that I do not understand and need some help. The powder I'm using to start off with is the Winchester 231 which is now manufactured by Hodgdon. The bullet I'm using is a 180 gain Copper plated RNFP. The load data in my Lyman 49th lists data for a 180 grain jacketed HP is start at 5.9 with a max load of 6.6. The load data on the Hodgdon website lists data for a 180 grain JHC is start at 5.2 with a max load of 5.8. The difference in load weights is striking to me unless I'm missing something and that would be is there a difference in powder weights using the same powder but with different bullet types? I would think that a 180 grain HP would take the same weight powder as a 180 grain RNFP or 180 grain JHC but I new at relaoding and wanted to ask more experience loaders. Thanks for any help.
I'm starting to learn how to load 10mm and have run across an issue that I do not understand and need some help. The powder I'm using to start off with is the Winchester 231 which is now manufactured by Hodgdon. The bullet I'm using is a 180 gain Copper plated RNFP. The load data in my Lyman 49th lists data for a 180 grain jacketed HP is start at 5.9 with a max load of 6.6. The load data on the Hodgdon website lists data for a 180 grain JHC is start at 5.2 with a max load of 5.8. The difference in load weights is striking to me unless I'm missing something and that would be is there a difference in powder weights using the same powder but with different bullet types? I would think that a 180 grain HP would take the same weight powder as a 180 grain RNFP or 180 grain JHC but I new at relaoding and wanted to ask more experience loaders. Thanks for any help.