I've seen very good accuracy with the Sierra 65 GK in a 1 in 9" CZ .223. The 63 Sierra and 64 Berger FB Varmint also did well. Poor results with the 64 Winchester. Couldn't get this bullet to shoot well in a 1 in 9" Savage .22-250 either. The 64 Nosler Bonded Base was only slightly better .
