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Anyone using Imr 7977.

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Old 03-25-2018, 07:51 AM
  #1  
Fork Horn
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Default Anyone using Imr 7977.

I am wondering if any here have tried this powder. Also wondering what you loaded it in and how it performed.
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Old 04-26-2018, 06:00 AM
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Spike
 
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Good powder. I believe it is a little slower than IMR 7828 which would make it great for the big magnums
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Old 06-07-2018, 03:33 PM
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Fork Horn
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My hope is it will give similar velocity of mag pro in my 270wsm. As both powders have a close burn rate.
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Old 06-08-2018, 07:40 AM
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Spike
 
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Any updates?
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Old 06-08-2018, 03:08 PM
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Fork Horn
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No updates yet but jope to load and try it soon.
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Old 06-09-2018, 08:25 AM
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Typical Buck
 
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ive noticed that IMR has come out with new powders that are not affected by temperature changes. have any of you reloaders used any of these powders and how they compare to the standard IMR powders. i noticed when looking them up on their website the new powders numbers arent referenced as to what the standard IMR powders can be used for. i use IMR 4350 and 3031 to reload some of my rifles and would like to know which of the new powders compare to these.
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Old 06-10-2018, 11:09 AM
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Fork Horn
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If you are looking for something in the 4350 and 4831 burn rate try 4455 I believe it is. I tried it in my 6.5x55 but could not tell you if it does what they claim. Never used it enough just testing loads for accuracy.
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Old 08-02-2018, 09:49 PM
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Fork Horn
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Well I got some shells loaded and shot them in my 270 WSM.. There was good news and bad news the good news is it will likely shoot fair groups. The bad news is it will be at lower velocities then I was hoping to achieve. It also liked the the closest to the starting load. I never had pressure signs I was using the Barnes 129 LRX bullet. I have a feeling this powder will like cartridges that are more over bore then my short mag. It turned out in the end I will likely be using RL22 at a max load as it shot under a three quarter inch group.
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