I use hard wood clamp jaw pads in the drill press vise. Wood jaws quick to make & give good friction. Drill hole shell head size then split the block with the bandsaw . Gap left by the saw cut gives enough movement for the jaws to grab the case with light pressure.
Was using the wood jaws as prototypes intending to make a set out of aluminum indexed with dowel pins . Work so well never made the aluminum jaws.
William
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