Howdy folks,
I just ordered a thousand RMR 124gn truncated cone FMJ rounds and I'm looking for some advice on this bullet. To date I've only ever reloaded normal FMJ RN in 9mm so I'm curious on seating depth and load data.
For 124gn FMJ RN I like using CFE Pistol so that's what I'm gonna try here too to start. My RN data likes 1.150" but these TC bullets fail the plunk test at this depth and want to go deeper- but how deep? I'm liking 1.100" for passing plunk on all my barrels but curious about your thoughts.
As for charge weight the bearing surface "looks about the same to me" but the shorter OAL will add pressure, and that's not very scientific nevertheless at 0.050" shorter I'm thinking I want to consider my max only a bit lower, so if my data says 4.9gn - 5.5gn of CFE Pistol @ 1.150" I would be good to try 5.0, 5.1, and 5.2 to start hunting for a medium-hot load I like?
Thanks for your thoughts and Merry Christmas
I just ordered a thousand RMR 124gn truncated cone FMJ rounds and I'm looking for some advice on this bullet. To date I've only ever reloaded normal FMJ RN in 9mm so I'm curious on seating depth and load data.
For 124gn FMJ RN I like using CFE Pistol so that's what I'm gonna try here too to start. My RN data likes 1.150" but these TC bullets fail the plunk test at this depth and want to go deeper- but how deep? I'm liking 1.100" for passing plunk on all my barrels but curious about your thoughts.
As for charge weight the bearing surface "looks about the same to me" but the shorter OAL will add pressure, and that's not very scientific nevertheless at 0.050" shorter I'm thinking I want to consider my max only a bit lower, so if my data says 4.9gn - 5.5gn of CFE Pistol @ 1.150" I would be good to try 5.0, 5.1, and 5.2 to start hunting for a medium-hot load I like?
Thanks for your thoughts and Merry Christmas