Firearm : Alexander Arms AR-15 (6.5mm Grendel) with 14.5" barrel length Ammunition : 120gr Norma FMJ Calibration : All penetrations are corrected penetrations, as necessary The bullet impacted at 2405 feet/sec and penetrated 16.5" before veering out the side of the block and impacting the support frame. No fragmentation was evident, but the slug is believed to have tumbled at about the 7" mark, with the maximum permanent cavity at the 11" mark. Lesions of more than 6" were created on the top and bottom block surfaces. Distance from the muzzle to the front face of the block was 50 yards. Brass Fetcher ballistic gelatin testing would like to thank John at http://www.65grendel.com for providing the permission to feature these test results and photographs on the website. We would also like to thank Alexander Arms http://www.alexanderarms.com and Speer http://www.speer-bullets.com for conducting the tests.