No misfired but had a box of core locks in 06 that had pistol powder mixed with the rifle powder. Was at the range shooting said ammo. Think it was the third shot that kicked excessively and was louder. Ejected the brass and primer pocket was huge. Got home and pulled bullets on the rest. Looked like a dot powder mixed in. Been too long to remember but was either red or blue dot. Rifle was good. Old Colombian Mauser.
