What he said. Gripping the bare magazine body changes your grip and possibly your point of aim.
I didn't have 10-rounders, but at the range and for carry reloads, liked to use the 8-rounders for that extra shot or two... PM9(sold) or my P9 now. If I carry the P9, it is with an 8-round reload in on-belt mag carrier on my opposite side. I do have IWB and on-belt mag carriers, but increasingly less space inside the waistline.
More carried ammo is always better, especially with small capacity single-stack Kahrs.
USAF Retired '88, NRA Life Member. Wife USAF Retired '96
Avatar: Wynn re-enlists his wife Desiree, circa 1988 Loring AFB, ME. 42nd BMW, Heavy (SAC) B-52G's
Frédéric Bastiat’s essay, The Law: http://mises.org/books/thelaw.pdf
Thomas Jefferson said
“A government big enough to give you everything you want, is strong enough to take everything you have.”
and
"Peace is that brief glorious moment in history when everybody stands around reloading".