Reeder Custom Guns - The capacity of the .300 GNR is a little over 20+ gr.

WB
The capacity of the .300 GNR is a little over 20+ gr.
Saturday, July 28, 2018, 19:49

You can figure the .357 necked with bullet seated at around 20-25% less. Actual power might not be too much different in a revolver, a carbine or single shot is another cup of tea.

I have no experience with the thinner cases .321 GNR (I should have taken Gary up on the choice of a new cylinder but I already had the .300 GNR and wanted a .327 so I could shoot any straight rimmed .32)

The historical origins were Gary wanting to make a .300 Herrett version of a revolver round. Later with the popularity of it growing he thought a little easier forming might help, but he didn't want to overlap the original too much. (A brilliant business move) The .321 GNR was the result. Gary like many manufacturers uses .308 barrels which most shoot .312" bullets fine. I cuss Ruger for making SSM .32 H&R barrels in .311 that spread .308" bullets all over. DW and TC, to name two, have always used .308 barrels for .32's just fine.

30-357 - Derek, 2018-07-28, 08:54
- you are asking about a cartridge that already exists - Gary Reeder, 2018-07-28, 23:11
- in a revolver the 300 GNR with a 110 grain bullet will do - Gary Reeder, 2018-07-28, 09:46
  - Isn't the new .321 GNR a ".308-.357"? - WB, 2018-07-28, 16:36
    - 30-357 - Derek, 2018-07-28, 19:22
      - the difference is about 20 years and almost 1000 fps - Gary Reeder, 2018-07-28, 21:42
        321 - Derek, 2018-07-29, 05:11
      - The capacity of the .300 GNR is a little over 20+ gr. - WB, 2018-07-28, 19:49