300-BLACKOUT-AMMO SECRETS

 But I haven't got one of these but (but damn if I did a scope cam would create a hell of the online video).  I'll comply with that by a 338 Lapua (also not in my arsenal), then a 300 WSM (Simply because I want an excuse for getting one some working day).62x39mm cartridge was the conventional cartridge for military use, but it was observed to bec