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Powder query: Vectan SP powders are from SP2 (fastest) to SP13 (slowest), they list SP7 & SP10 for .223. SP10 is for bullet weight up to 55 grains with a starting load of 20.8 grains. SP7 is for bullet weight from 60 grains with a starting load of 20.1.
I have a nearly full tub of SP8, why isn't that or the SP9 listed? Is it unsuitable, or do those other two simply cover the range of bullet weights, so they don't bother listing this?
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