Tag: TTSX
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MP540 Powder in the 308 Winchester
I made it out to the range with my initial test loads using the American Reloading MP540 powder. It worked very well. This is suppose to be similar to Vihtavuori N540 powder, so I started with their published starting load of 41.7 grains. From the published load data, the expected velocity from a 24″ barrel…
