Speaking of dry firing.... In an article titled "Secrets of the Silo Masters" Cathy Winsted said she dry fires more then she does live fire.
Winstead said she doesnt fire a lot of live rounds, but she does practice as much as possibleeven when she has as little as 30 minutes. I work on the basics, she said, position, hold, trigger.
She estimates she works a ratio of eight to one dry firing to live rounds, and she picks up her rifle as often as possible. You have to put the time in, even if it comes in little blocks, she said. I dont have many marathon training sessions, but I do have a lot of productive smaller sessions. Everybody has 10 minutes, but not everybody has 2 hours. What makes the difference is the total time you spend in training, as long as youre working on the basics.
http://www.gun-tests.com/performance/aug96secrets.html"eeleater" brought up two good points. One being during dry firing you will detect any movement in your cross hairs as the trigger breaks and, when shooting "Bullseye" pistol you learn very good trigger control (nothing moving but the trigger finger). I think this carries over to all types of shooting.
Good Luck
Bill