Now, you need to get your grandma into OCing. Get her set up with a shoulder rig, and get her a pistol in .357 magnum. Then she can keep practicing with .38's, but carry .357 magnum.
I really don't understand why the AARP hasn't jumped on the handgun-carrying bandwagon. Well, I do understand... they want free stuff from the political party that controls guns more than the other. But it seems to show a blatant disregard for the safety of the people it is trying to help.