Just wanted to mention a practice I've used when training. You let a friend load the rifle for you without looking and then you aim and shoot. Your friend alternates between loading the rifle with a real round and a "snap cap". This can produce some funny reactions! But it will also focus your training on the flinching and allow you to find out if you have it or not.

Your suggestion does work for experienced shooters as well as the novice. I think most experienced shooters realize that they are flinching and stop shooting , calm down, or change to a lighter rifle. Not always so with the novice, they'll keep shooting until someone proves to them that they really are flinching. It's a good lesson to learn.

If you trust yourself not to cheat, load some range rounds with and without new (live)primers. You'll quickly find out if you have a flinch to work on and you don't have to let your friends know.

I try to shoot 10 shots with a 22RF or 223 for every shot I take with a large caliber. This is for the away-from-the-bench practice.

Cures for flenching:

1. Prozac
2. Carbon monoxide
3. Duct Tape
4. Accounting
5. Uranium-238
6. Scotch, Single-Malt
7. Repeated Hammer Blows To The Head
8. 24 Hours Of Liberace Reruns
9. Vicks Nite-Time Cough Syrup
10. Walter & The .577 T.Rex

Sorry, I had a little too much time on my hands.