sight radius

Hi KTOGers? Had my new RDB-C (Z4Mxx) out to my parents 160 Acre property for a physically distanced visit and to shoot our firearms! (That day - RDB-C, Tikka T3 light Stainless 308, Husqvarna 9.3x62 Commercial that my brothers buddy loaned him, Dad's Savage 114 Syn in 243. Dad coined the term...