.223 Rem - 77gr Berger OTM Tactical with N540
This video details a reloading and ballistics test of the .223 Remington cartridge using 77gr Berger OTM Tactical bullets and Vihtavuori N540 powder. The instructor, with apparent expertise in reloading and ballistics, conducts a suppressed versus unsuppressed shooting comparison to gather data for barrel harmonics testing. The experiment involves meticulous load development across various powder charges and careful observation of group sizes and velocities.










