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.38 Special/.357 Magnum Speer Shotshell capsules data:
630--9.0 grains---1001fps 6" barrel
Unique--5.5-------1111
231-----5.0-------996
Bullseye--4.5-------1021
700X-----4.5-------1060
HP38------4.5------1054
overall length 1.500" for .38 and .357
#9 shot used
Speer says give the case mouth a moderate roll crimp into the side of the capsule sleeve being careful not to break the plastic.
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