Speed loaders.
During my extensive weapons training in the Navy we dissected the Michael Platt and William Matix shoot out for hours and hours and hours...The mistakes that the agents made were many but one thing I learned is that while revolvers are reliable, when you have been shot in the hand and you have lost your glasses it is much easier in my opinion to insert a loaded magazine into your hand gun than to try and load a revolver.
Speed loaders.