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Glad I have a good supply of it to keep me in 10mm heavy cast woods loads for the foreseeable future. Blue dot and aa#9 work well for practice/ general purpose loads.
 
A little while back, saw 3N37 available
When I was loading 10mm, I liked 3N37.

You like big, fluffy powder like 800X? How about Herco, it's a fluffy case-filler. You don't see many recommendations for it anymore, now that there are so many newer powders out. But Alliant used to publish 10mm data for it. It's a bit faster than 800X but would be good for mid-range loads. Blue Dot is pretty fluffy, better for hotter loads.

Others I've successfully used in 10mm are Ramshot Silhouette and Vectan AO.
 
That is from 2016. The most updated, updated burn rate chart is here: https://imrpowder.com/wp-content/uploads/2019/12/2020-burn-rate-chart.pdf
 

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