If you wish to shoot competitions, there is a rested pistol event, where you shoot with a correct single hand hold, but with the bottom of the grip rested on a 50 mm dia bar.

Its not as easy as it sounds, there is a competition promoted on here for the event under the MPL group, and some county competions include it, and it is also included in the British Championships.

If you PM "Zooma" on here he can give you the rules and run down on it.

Have Fun
Robin