I developed the 300 GNR almost 20 years earlier than the 321 GNR. I had heard so much about how powerful the 327 Federal was I decided to develop one much better. The 300 GNR requires a lot more work and time expended to get a cartridge ready to use, whereas the 321 GNR takes a simple sizing of the 357 Magnum cartridge to get the brass ready to load. The 300 GNR and 321 GNR are ballistically identical but one was much easier to load. That was the 321 GNR. It is almost 1000 fps faster and much more powerful than the 327 Federal with the same weight bullet. It made the 327 Federal obsolete.
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30-357
- Derek, 2018-07-28, 08:54
- you are asking about a cartridge that already exists - Gary Reeder, 2018-07-28, 23:11
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in a revolver the 300 GNR with a 110 grain bullet will do
- Gary Reeder, 2018-07-28, 09:46
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Isn't the new .321 GNR a ".308-.357"?
- WB, 2018-07-28, 16:36
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30-357
- Derek, 2018-07-28, 19:22
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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
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the difference is about 20 years and almost 1000 fps
- Gary Reeder, 2018-07-28, 21:42
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30-357
- Derek, 2018-07-28, 19:22
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Isn't the new .321 GNR a ".308-.357"?
- WB, 2018-07-28, 16:36