JSB BC?

JSB BC?

Joined: April 21st, 2009, 11:05 pm

January 11th, 2018, 6:26 am #1

Anyone know what the BC is for,
JSB .30 cal 44.75gr
JSB .25 cal 33.95
JSB .25 cal 25.40
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Joined: June 22nd, 2012, 7:35 pm

January 11th, 2018, 11:48 am #2

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