twist checking device

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winchester 94
Inlägg: 531
Blev medlem: 23 sep 2005, 11:37

twist checking device

Inlägg av winchester 94 »

hi
Gerard Schultz from Gs custom bullet told me thar there are twist checking device for checking the twist rate of barrels and could be purchased from riistamaa.finland. has any one heard or seen such a device before and can tell me about it. my finnish is poor and i can't read about this device in the riistamma website.
regards
w94