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I just bought some Reloader10x from Alliant. Can't tell you if this will fill your need, but it is a new powder out on the market specifically designed for the .22-250 and .223 cartridges. Hopefully, when I get some more cases fireformed and other leftover recipes fired, I'll delve into this powder and see what the fuss is all about.
In my limited experience, I've found that compressing the powder doesn't necessarily bring the best accuracy. Neither does the fastest velocity. Maybe try Reloader 15 or 7. Those have provided great results for me also...
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