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Taos NM
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June 24, 2024 - 6:58 pm
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Loading 40-70-320 anyone have safe load for Unique? I use 12 grains for 40-65-250. Thanks Bill

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June 25, 2024 - 5:09 pm
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426crown said
Loading 40-70-320 anyone have safe load for Unique? I use 12 grains for 40-65-250. Thanks Bill

  

Bill,

I strongly would not recommend using Unique powder in that cartridge.  Instead, load it with 24 grains of 4198.

Bert

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June 25, 2024 - 10:40 pm
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I use 22 or 23 grains of 5744 in my 40-65.  With a heavier bullet you would use less powder.

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July 1, 2024 - 12:49 am
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I strongly agree with Bert. Unique has a fast burn rate. You are much better off with a medium-speed burn rate powder such as IMR 4198 or (my favourite) 5744.

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July 1, 2024 - 2:13 am
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I loaded the 40-70 with 5744, no one had info on Unique..Bill

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Northern edge of the D/FW Metromess
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July 1, 2024 - 10:39 pm
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426crown said
I loaded the 40-70 with 5744, no one had info on Unique..Bill

  

It’s quite possible to work up safely from 8 grains of Unique with a half sheet of toilet paper as a spacer. I’m a big fan of 5744 for similar cartridges but it’s so dirty and stubborn to clean I’m beginning to see the light and dabbling with Bert’s favorite, 4198.

 

Mike

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July 2, 2024 - 1:19 am
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I use 4198 for the 45-90, 45-75 and the 50-95. I also use H 4198 SC.  Similar to the IMR but meters better when using a powder dispenser.

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