ASSRA Forum › General › Reloading the Single Shot Rifle › 300MP in 8.15x46r
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Normal Topic 300MP in 8.15x46r (Read 123 times)
yamoon
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300MP in 8.15x46r
Nov 1st, 2025 at 10:47am
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I couldn’t find IMR4227 in 2019 so I bought 8lb of 300MP, has any one used it? I normally shoot 13gr of 4227 with 170gr stop ring cast 20 to 1.
Thanks Mike
  
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JHand
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Re: 300MP in 8.15x46r
Reply #1 - yesterday at 6:23pm
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I don't have experience with that caliber, but from what I understand, it is fairly similar to 32-40. In my 32 with a 180gr, I use about 14gr of 300mp
  
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