Fear not. I carry 8+1 all the time in the K9 or P9, and have never had a problem. When I go to the range, that carry load gets shot some time before I leave. I often will load it again with range ammo 8+1 for more practice. It's just not an issue. As already mentioned, it's easier to load one in the mag and chamber that first, then load seven in the mag and then insert the mag.