1 ='s one round in the chamber and magazine loaded to capacity
No, magazine is too bad @ 15 with 1 in the pipe. If you notice when you stick a fully loaded magazine into a gun, the magazine hangs low?
I believe it damages the gun, too much force downward from the slide of the gun, to the magazine/magazine catch/springs in side etc...... I carry 14+1, removed one from the magazine of 15. I have two/three reloads so I do not worry about this extra round, I could see for guys who are 7+1.
I believe I notice it on the Glock, where you put 15 in the magazine the slide raises up due to the force of the magazine.