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Speed Metal: Hard-core golf balls
From the Nov. 27 edition of Golf Digest Stix:
![/content/dam/images/golfdigest/fullset/2015/07/20/55ad77cdadd713143b4284c0_golf-equipment-blogs-hotlist365-oncore-metal-golf-ball.jpg](http://golfdigest.sports.sndimg.com/content/dam/images/golfdigest/fullset/2015/07/20/55ad77cdadd713143b4284c0_golf-equipment-blogs-hotlist365-oncore-metal-golf-ball.jpg.rend.hgtvcom.966.725.suffix/1588639624281.jpeg)
They're legit: USGA rules allow metal-core balls.
You've heard of medal play. Are you ready for metal play? A hollow metal-core golf ball was declared conforming as part of the USGA's Rules of Golf update Nov. 6. Though the rules require equipment to have a "traditional and customary form and make," the USGA said the rigid center of the OnCore MA Series 1 ($40 a dozen, available in January) is an exception to Appendix III of the Rules. The metallic core shifts weight to the perimeter, which OnCore says will "reduce slices by 30 percent."