In my experience with all three powders in the .22 Hornet and K-Hornet, H110/W296 is the fastest burning, Li'l Gun is noticeably slower than 110, and 300 MP is very slightly slower than Li'l Gun--but definitely not as slow as Accurate 1680. That's with 2-3 different lots of each powder.

I don't think 300 MP is much denser than Li'l Gun, but haven't really checked.


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