Thingiverse
Group Sizing Template
by koksala
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This template is designed to be fixed between the jaws of a comparator and measures group sizes for .338, .30, 6.5mm and .22 diameter bullet holes.
V2 now has 6mm instead of .338...
Threads are M4...
V2 now has 6mm instead of .338...
Threads are M4...
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