I shoot various competitions with my 617s from Steel Challenge to local fun matches. I've never owned Speed-Beez but have the privilege of watching a regular in our group laboriously load and reload his one Speed-Bee while we watch. I load all 6 of mine before I go to the line and avoid wasting other peoples' time.

If you are a non-competitive casual shooter I guess Speed Beez are OK.

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Bob.
SWCA 1821