For Metallic Silhouette Shooting, I have designed the 7 GJW
(CIP-List say "7 x 49 GJW".
It?s a extended 7 T/C U and optimized for the 168 gr. Matchking.
10 in. barrels make 550 m/s and 15 in = 600 m/s.
Prototype brass from the 5,6 x 50 Magnum. Also Rimmed version. Now, RUAG in switzerland make brass with original haedstamp.
See the site in german language: www.silhouetten.org