I agree with Double Lab. I have the adjustable shot-powder bar in a mec grabber I use and it meters fine. And the report is louder. Makes you wonder if you loaded shells too hot. Longshot is my go to powder for 16 - 10 gauge hunting loads as you can get good velocity with lower pressure than most other powders available. 16 gauge society may have some loads using the other powders you listed.
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