American 30 first group

madcat Senior Member Posts: 105	American 30 first group Jan 8, 2015 8:42:27 GMT -8 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by madcat on Jan 8, 2015 8:42:27 GMT -8 I believe its 3 groove polygonal with 11 degree target crown.