8x57 said:Dry firing using snap caps can be very beneficial and limited dry firing of a centrefire rifle shouldn't damage it. However don't dry fire a .22 as being a rimfire the firing pin can contact the edge of the chamber and cause damage in short order.
If you could get a mate to assist one method (often used by top level competition shooters to test for flinch) is to get a friend to load for you without you seeing if a live round or snap cap has been loaded. The safety is applied and the gun passed to you while at all times it is pointed in a safe direction downrange, you then take the shot. If you snatch the shot and it is only a snap cap you start to look a little silly.
I have been advised in the past that regular practise with an old fashioned spring powered air rifle, not a modern recoiless PCP, is much more beneficial than practise with a .22 rimfire.
a couple of things i found that helped cure me with blinking
i lightened the trigger pull ,so i was not conciously waiting for the bang because of a heavy trigger