Slow burning powder rates

280 Ackley. It's good under 169 hammer hunters. I haven't had any since 2020 though
 
For me N565 is almost identical to H1000. The same powder charge in a 6.5PRC was within 10fps and had a lower ES.

It's interesting to see that it's on the other side of Retumbo on the chart. When it comes to powder burn rates, there are (apparently) no absolutes.
 
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