Almost blew my Rifle up yesterday

[Ibmikey]

With three rifles and a pistol in 300 Blackout it is necessary to reload, I insure there is the correct powder for the cartridge and each magazine and rifle is marked with a red tag indicating 300 Blackout. All ammo and loaded magazines in Blackout are kept separate from the .223 ammo. Love shooting the cartridge but am very cautious to keep it segregated.