38 cal 40holes
thingiverse
Customized version of http://www.thingiverse.com/thing:260104 Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=260104 Instructions Using the following options: number_of_rows = 5 padding = 2 number_of_columns = 8 height = 10 diameter = 11.3
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